首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 15 毫秒
1.
Severe enduring reading- and writing-accuracy difficulties seem a phenomenon largely restricted to nations using complex orthographies, notably Anglophone nations, given English’s highly complex orthography (Geva and Siegel, Read Writ 12:1–30, 2000; Landerl et al., Cognition 63:315–334, 1997; Share, Psychol Bull 134(4):584–615, 2008; Torgesen and Davis, J Exp Child Psychol 63:1–21, 1996; Vellutino, J Learn Disabil 33(3):223, 2000). They seem rare in transparent orthography nations such as Finland, which use highly regular spelling and few spelling rules beyond letter sounds, and most children read and write with impressive accuracy by the end of Year 1 (Holopainen et al., J Learn Disabil 34(5):401–413, 2001; Seymour et al., Br J Psychol 94:143–174, 2003; Spencer and Hanley, Br J Psychol 94(1):1–29, 2003; J Res Read 27(1):1–14, 2004). Orthographic complexity has strong and diverse impacts on reading, writing and academic development (Aro, Learning to read: The effect of orthography, 2004; Galletly and Knight, Aust J Learn Disabil 9(4):4–11, 2004; Aust Educ Res 38(3):329–354, 2011). Despite these strong effects, orthographic complexity is rarely included as a variable in reading research studies considering evidence from both Anglophone (complex orthography) and transparent-orthography readers, or included in discussion of factors influencing results. This paper discusses the differences in reading-accuracy development and difficulties evidenced in studies of Anglophone (complex-orthography) and transparent-orthography readers. It then explores instances of orthographic complexity not being considered in studies where it may have impacted results. This disregarding of orthographic complexity as a variable in research studies appears an oversight, one likely to be contributing to continuing confusion on many aspects of reading and writing development in both healthy- and low-progress readers. Needs for research in these areas are discussed.  相似文献   

2.
It has been suggested that linguistic proximity affects the ease of acquisition between typologically similar languages, due to the fact that the languages have shared phonological and orthographic properties (Koda, 2008). Thus, a native Hebrew speaker learning Arabic as a foreign language (AFL) would be expected to easily develop linguistic proficiency. This study examined the developmental trajectory for spelling in AFL among native Hebrew speaking adolescents, with specific attention to the development of accurate representations for four novel phonemes and their graphic symbols ( ). The sample included eighth (N = 119), ninth (N = 125), and tenth graders (N = 91). We were further interested in examining the contribution of orthographic as opposed to phonological knowledge to spelling in AFL. Five experimental tasks were created for the study: real word recognition, orthographic sensitivity, auditory discrimination, and dictation of real and pseudowords. Findings for the eighth grade replicated earlier findings for real word spelling (Fragman & Russak, 2010) showing 20 % accuracy scores. While spelling accuracy improved by tenth grade, scores remained extremely low (25 %). Lexical representations for the four novel phonemes tested were also generally low, with different levels of accuracy for each phoneme. It is possible that the difficulties were the result of interference from shared linguistic elements. Finally, it was found that both orthographic as well as phonological knowledge contribute to real and pseudoword spelling. Implications of these findings are discussed in relation to language teaching policy and pedagogy.  相似文献   

3.
We examined the double deficit hypothesis (Wolf & Bowers, 1999) and literacy development in a longitudinal dataset of 1,006 Finnish children who were nonreaders at school entry. A single phonological awareness (PA) deficit was a predictor of pseudoword spelling accuracy and reading fluency, and a single rapid automatized naming (RAN) deficit was a predictor of reading fluency. The group with both PA and RAN deficits experienced the most extensive reading and spelling difficulties. However, all groups included both poor and average Grade 2 readers and spellers. Poor letter knowledge and vocabulary, task avoidance, attention difficulties, hyperactivity, and lack of teaching at home were additional risk factors for reading and spelling problems, but their impact varied depending on the presence of PA and RAN deficits.  相似文献   

4.
An experiment was carried out to compare the time course of the acquisition of two basic spelling mechanisms in Spanish, a shallow system, and French, a deep system. The first was lexical. It relies on the orthographic lexicon, a hypothetical structure containing the orthographic representations of words accessible for word spelling. To evaluate its contribution the participants were asked to spell words of high and low frequency containing phonemes which can take different graphemic values. The second mechanism relies on sub-lexical processes. Its contribution was evaluated asking the participants to spell words containing consistent phoneme-to-grapheme translation pairs which were identical in Spanish and French. Two contrasting predictions were considered, one derived from the Orthographic Depth Hypothesis (ODH, Frost, 2005) and the other from the Self-Teaching Hypothesis (STH, Share, 2004). According to the ODH, the orthographic lexicon should develop more rapidly in French than in Spanish because Spanish spellers can rely on phoneme-to-grapheme translation mechanisms to spell most words, meaning that they do not need to resort to the orthographic lexicon. In contrast, the STH suggests that effective identification of a word gradually generates its orthographic representation. The results revealed that both spelling mechanisms develop far faster in Spanish than in French. The fact that word frequency effects appeared earlier in Spanish than in French, indicating that the orthographic lexicon incorporates words more rapidly in a shallow than in a deep system, is clearly incompatible with the ODH and easier to handle in the context of the STH.  相似文献   

5.
The goal of this article is to examine the racially hostile environment of U.S. public schooling towards Black males. Drawing on the work of Foucault (Discipline and punish. The birth of the prison, Penguin Books, London, 1977; Michel Foucault: beyond structuralism and hermeneutics, The Harvester Press, Brighton, 1982) regarding the construction of society’s power relations and Bourdieu’s (Power and ideology in education, Oxford University Press, New York, 1977; Handbook of theory and research for the sociology of education. Greenwood Press, New York, 1986; The logic of practice. Polity Press, Cambridge, 1990) work concerning how beliefs are established, this article demonstrates how power operates within schools alongside racism, racial profiling, and gender stereotypes to criminalize Black males. Additionally, the utilization of the theoretical lenses of populational reasoning (Popkewitz in Struggling for the soul: the politics of schooling and the construction of the teacher, Teachers College Press, New York, 1998), conceptual narrative (Somers and Gibson in Social theory and the politics of identity, Blackwell, Cambridge, 1994), and critical race theory (Delgado and Stefancic 2001) links the common narrative and the cultural memory of Black males to the death of Trayvon Martin and the treatment of Black males in schools.  相似文献   

6.
The transition from the industrial age to the information age has happened and is still happening in our society (Duffy, 2009). However, our current educational systems still operate based on the needs of the industrial-age society (Watson, Watson, & Reigeluth, n.d), making them among the least impacted organizations (Reigeluth & Joseph, 2002). This misalignment between schools and society takes the form of a discrepancy between what and how we teach students in schools and how schools are organized and operated (Banathy, 1991; Hargreaves, 1999; Wagner et al., 2006). Educational systems should address current students’ needs to facilitate their learning process and better preparethem for their future lives in society (Collins & Halverson, 2009). In this article, we explain how we envision the new paradigm of education and what roles educational technologists should play to help transform educational systems to this new paradigm.  相似文献   

7.
Despite an increased focus on science, technology, engineering, and mathematics (STEM) in U.S. schools, today’s students often struggle to maintain adequate performance in these fields compared with students in other countries (Cheek in Thinking constructively about science, technology, and society education. State University of New York, Albany, 1992; Enyedy and Goldberg 2004; Mandinach and Lewis 2006). In addition, despite considerable pressure to promote the placement of students into STEM career fields, U.S. placement is relatively low (Sadler et al. in Sci Educ 96(3):411–427, 2012; Subotnik et al. in Identifying and developing talent in science, technology, engineering, and mathematics (STEM): an agenda for research, policy and practice. International handbook, part XII, pp 1313–1326, 2009). One explanation for the decline of STEM career placement in the U.S. rests with low student affect concerning STEM concepts and related content, especially in terms of self-efficacy. Researchers define self-efficacy as the internal belief that a student can succeed in learning, and that understanding student success lies in students’ externalized actions or behaviors (Bandura in Psychol Rev 84(2):191–215, 1977). Evidence suggests that high self-efficacy in STEM can result in student selection of STEM in later educational endeavors, culminating in STEM career selection (Zeldin et al. in J Res Sci Teach 45(9):1036–1058, 2007). However, other factors such as proficiency play a role as well. The lack of appropriate measures of self-efficacy can greatly affect STEM career selection due to inadequate targeting of this affective trait and loss of opportunity for early intervention by educators. Lack of early intervention decreases selection of STEM courses and careers (Valla and Williams in J Women Minor Sci Eng 18(1), 2012; Lent et al. in J Couns Psychol 38(4), 1991). Therefore, this study developed a short-form measure of self-efficacy to help identify students in need of intervention.  相似文献   

8.
Sixty-five Norwegian 10th graders used the software Read&Answer 2.0 (Vidal-Abarca et al., 2011) to read five different texts presenting conflicting views on the controversial scientific issue of sun exposure and health. Participants were administered a multiple-choice topic-knowledge measure before and after reading, a word recognition task, and a reading motivation inventory that included two dimensions: Science reading self-efficacy, focusing on readers’ beliefs about their capabilities to comprehend what they read in science, and science reading task value, focusing on readers’ beliefs about how important, useful, and interesting it is to comprehend science texts. In addition, strategic reading pattern was assessed in terms of the degree of non-linear reading behavior. Multiple regression analysis showed that word recognition skills strongly predicted learning from the texts, as assessed by participants’ increase in topic knowledge. However, when multiple-text comprehension indicated by performance on open-ended short-essay questions was the dependent variable, not only word recognition but also strategic reading pattern and science reading self-efficacy emerged as unique predictors when topic knowledge was controlled for. Science reading task value was not related to performance. This study provides new evidence that new literacy competencies needed in a knowledge society, such as synthesizing or integrating across multiple conflicting sources of information, still largely involve word-level, strategic, and motivational processes that may profitably be targeted through systematic instruction.  相似文献   

9.
Societal benefit depends on the general public’s understandings of biotechnology (Betsch in World J Microbiol Biotechnol 12:439–443, 1996; Dawson and Cowan in Int J Sci Educ 25(1):57–69, 2003; Schiller in Business Review: Federal Reserve Bank of Philadelphia (Fourth Quarter), 2002; Smith and Emmeluth in Am Biol Teach 64(2):93–99, 2002). A National Science Foundation funded survey of high school biology teachers reported that hands-on biotechnology education exists in advanced high school biology in the United States, but is non-existent in mainstream biology coursework (Micklos et al. in Biotechnology labs in American high schools, 1998). The majority of pre-service teacher content preparation courses do not teach students appropriate content knowledge through the process of inquiry. A broad continuum exists when discussing inquiry-oriented student investigations (Hanegan et al. in School Sci Math J 109(2):110–134, 2009). Depending on the amount of structure in teacher lessons, inquiries can often be categorized as guided or open. The lesson can be further categorized as simple or authentic (Chinn and Malhotra in Sci Educ 86(2):175–218, 2002). Although authentic inquiries provide the best opportunities for cognitive development and scientific reasoning, guided and simple inquiries are more often employed in the classroom (Crawford in J Res Sci Teach 37(9):916–937, 2000; NRC in Inquiry and the national science education standards: a guide for teaching and learning, 2000). For the purposes of this study we defined inquiry as “authentic” if original research problems were resolved (Hanegan et al. in School Sci Math J 109(2):110–134, 2009; Chinn and Malhotra in Sci Educ 86(2):175–218, 2002; Roth in Authentic school science: knowing and learning in open-inquiry science laboratories, 1995). The research question to guide this study through naturalistic inquiry research methods was: How will participants express whether or not an authentic inquiry experience enhanced their understanding of biotechnology? As respondents explored numerous ideas in order to develop a workable research question, struggled to create a viable protocol, executed their experiment, and then evaluated their results, they commented on unexpected topics regarding the nature of science as well as specific content knowledge relating to their experiments. Four out of five participants reported they learned the most during authentic inquiry laboratory experience.  相似文献   

10.
Considering the current structural challenges that exist for students of color (SOC) in accessing a higher education, an epistemology is needed that better represents the complex process SOC endure in this pursuit. College access literature either proposes stages (Hossler and Gallagher in Coll Univ 62(3):207–221, 1987), contextual layers (Perna in Higher education: handbook of theory and research. Springer, Amsterdam, 2006) or a pipeline approach (Horn in Confronting the odds: students at risk and the pipeline to higher education. National Center for Education Statistics, Washington, D.C., 1997; Cabrera and LaNasa in Understanding the colleges choice of disadvantaged. Jossey-Bass Inc, San Francisco, 2000a) that do not consider the additional resources and skills SOC must possess in navigating their educational pathways. This paper presents findings from two larger studies to propose an approach that colors outside the standard college access and readiness frameworks and uses a more culturally responsive approach to consider the complex and auspicious ways in which SOC navigate their college pathways. Culturally responsive recommendations for increasing college readiness and access for SOC in secondary schools will be provided based on the perspectives of SOC themselves.  相似文献   

11.
Children’s picture books that recreate, parody, or fictionalize famous artworks and introduce the art museum experience, a genre to which I will refer as “children’s art books,” have become increasingly popular over the past decade. This essay explores the pedagogical implications of this trend through the family program “Picture Books and Picture Looks” conducted at the Art Institute of Chicago. Program sessions were observed to learn the extent to which picture books featuring the painting A Sunday on La Grande Jatte1884 (Seurat) informed and impacted children’s experiences with the original artwork. The books Katie’s Sunday Afternoon (Mayhew, 2005), Babar’s Museum of Art (De Brunhoff, 2003), and Willy’s Pictures (Browne, 2000) provided the foundation for the program. In addition to these three books, The Dot (Reynolds, 2003), which does not include a reference to La Grande Jatte (Seurat, 1884–1886), acted as a “control” variable. This research demonstrates that while most picture books can be used to establish a level of comfort in an environment that is new to children, those that directly referenced the painting provided a base level of knowledge from which children could confidently draw upon encountering the original work. The research further indicated that, when used in conjunction with original artworks, children’s art books provide unique and distinct entry points for talking about art. The inclusion of artwork in children’s picture books elicits an enthusiasm and recognition that enhances the museum experience, and such books can be effective tools for enabling reflective, imaginative experiences with art.  相似文献   

12.
This article explores four adolescent novels published between 1999 and 2010 specifically for the intersections of Christian faith and lesbian and gay sexual identities. Using cultural, queer, and ideological theories, the piece makes distinctions between progressive and traditional depictions of both Christianity and LGBTQ teen protagonists in Nancy Garden’s The Year They Burned the Books (1999), Laura Torres’s November Ever After (1999), Alex Sanchez’s The God Box (2007), and Mark Hardy’s Nothing Pink (2008).  相似文献   

13.
The validity of two measures of English reading comprehension was examined across three different groups of English language learners (ELLs; 64 Portuguese, 66 Spanish and 65 Cantonese). All three groups were achieving within the average range in second grade. An exploratory principal components analysis of reading skills was carried out to determine which skills were related to two commonly used tests of reading comprehension, the Woodcock Language Proficiency Battery??s test of Passage Comprehension (WLPB-PC; Woodcock, 1991) and the Gray Oral Reading Test-4 (GORT-4; Wiederholt & Bryant, 2001). The factor solutions were different for the three language groups but showed many similarities in that the GORT-4 and WLPB-R tests of reading comprehension fell on the same factor within each group. Hierarchical regression analyses examining relationships among vocabulary, decoding and reading comprehension showed that language group membership did not significantly predict performance on either measure of reading comprehension. Differences that arose are likely due to issues with task validity and not ELL status. Limitations and future research are discussed.  相似文献   

14.
This contribution looks at a series of qualitative and quantitative investigations on the study success and study behavior of so-called non-traditional students. Of particular interest are two aspects: the combination of qualitative and quantitative findings, which are mutually complementary and in a sense present plausible corrections for one-sided observations, and controlled observations over a long period of time, as the first studies were carried out within the framework of an international study in 1998 and the last one within the framework of a project sponsored by the German Research Foundation (DFG) in 2007. This longer time period certainly increases the plausibility of the cautious diagnoses made, which attempt to capture the relevant changes in this field of research. Such mixed methods research (Derzin 1970, 1989; Flick 1992) – i.e. the link between quantitative and qualitative research and survey methods often termed “triangulation” (cf. Prein/Kelle/Kluge 1993; Flick 1995) – has the advantage that a complex field of research can be scanned using different instruments and through a type of “convergence model” (Jacob 2001) the data won from different methods can be used to mutually validate the results. The qualitative material used in this study comes from theoretical sampling (cf. Glaser 1965; Strauss/Corbin 1996) of data from six German higher education institutions from two points in time (1998 and 2005; n=2x c. 400 surveyed respondents). The quantitative analysis, which was especially carried out for our study, profits from the fact that 2500 interested people responded to our recruitment search for biographic-narrative interviews. This group of people was then asked to participate in a special online survey in 2007 – a cooperative initiative in which around one third of the initial respondents took part. That does, however, mean that the quantitative study is not representative. Our overall research design remains complex, but retains an exploratory character  相似文献   

15.
Agnotology is a term that has been used to describe the study of ignorance and its cultural production (Proctor in Agnotology: the making and unmaking of ignorance. Stanford University Press, Stanford, 2008). For issues that are contentious in the societal realm, though largely not in the scientific realm, such as human evolution or the broad basics of human-induced climate change, it has been suggested that explicit study of relevant misinformation might be a useful teaching approach (Bedford in J Geogr 109(4):159–165, 2010). Recently, Legates et al. (Sci Educ. doi:10.1007/s11191-013-9588-3, 2013) published an aggressive critique of Bedford’s (J Geogr 109(4):159–165, 2010) proposals. However, the critique is based on a comprehensive misinterpretation of Bedford’s (J Geogr 109(4):159–165, 2010) paper. Consequently, Legates et al. (Sci Educ. doi:10.1007/s11191-013-9588-3, 2013) address arguments not actually made by Bedford (J Geogr 109(4):159–165, 2010). This article is a response to Legates et al. (Sci Educ. doi:10.1007/s11191-013-9588-3, 2013), and demonstrates their errors of interpretation of Bedford (J Geogr 109(4):159–165, 2010) in several key areas: the scientific consensus on climate change; misinformation and the public perception of the scientific consensus on climate change; and agnotology as a teaching tool. We conclude by arguing that, although no single peer-reviewed publication on climate change, or any other scientific issue, should be accepted without due scrutiny, the existence of a scientific consensus—especially one as overwhelming as exists for human-induced climate change—raises the level of confidence that the overall findings of that consensus are correct.  相似文献   

16.
Examples are believed to be very important in developing conceptual understanding of mathematical ideas, useful both in mathematics research and instruction (Bills & Watson in Educational Studies in Mathematics 69:77–79, 2008; Mason & Watson, 2008; Bills & Tall, 1998; Tall & Vinner, 1981). In this study, we draw on the concept of an example space (Mason & Watson, 2008) and variation theory (Runesson in Scandinavian Journal of Educational Research 50:397–410, 2006) to create a lens to study how examples are used for pedagogical purposes in undergraduate proof-based instruction. We adapted the construct of an example space and extended its application to the constructs of example neighborhood, methods of example construction, and the functions of examples. We explained how to use our new lens to analyze the collection of examples and non-examples that the students had access to. We then demonstrate our method by analyzing the collection of examples and non-examples of a mathematical group the professor of an abstract algebra class presented during lectures or assigned to students in problem sets or exams.  相似文献   

17.
Reading fluency is one of the basic processes of learning to read. Children begin to develop fluency when they are able to form orthographic representations of words, which provide direct, smooth, and fast reading. Dyslexic children of transparent orthographic systems are mainly characterized by poor reading fluency (Cuetos & Suárez-Coalla 2009; Spinelli, De Luca, Di Filippo, Mancini, Martelli, & Zoccolotti, 2005; Wimmer, 1993). Therefore, the main problem for these children could be the difficulty in developing orthographic representations of the words they read. The aim of this study was to test the ability of dyslexic Spanish-speaking children (whose native language is Spanish) to develop orthographic representations and determine if the context helps them. For this, two experiments were conducted with a group of 100 children, 7–12 years of age. The groups were comprised of 20 dyslexics, 40 chronological age-matched controls and 40 reading level-matched controls. In the first experiment, eight unfamiliar words (four short and four long) were presented six times within the context of a story. In the second experiment, eight pseudowords were presented on a computer and the children had to read them aloud. In both experiments, the reading and articulation times of experimental and control stimuli were compared, before and after the training. Children without dyslexia showed a decrease of the influence of length of word on reading speed, indicating a lexical reading, while for dyslexic children, the influence of length remained unchanged. These results appeared when the stimuli were presented in the context of a story as well as when presented in isolation. In short, our results describe that dyslexic children of transparent orthographic systems have problems in developing orthographic representations of words.  相似文献   

18.
This paper reports on 6–11-year-old children’s ‘sayings and doings’ (Harré 2002) as they explore molecule artefacts in dialectical-interactive teaching interviews (Fleer, Cultural Studies of Science Education 3:781–786, 2008; Hedegaard et al. 2008). This sociocultural study was designed to explore children’s everyday awareness of and meaning-making with cultural molecular artefacts. Our everyday world is populated with an ever increasing range of molecular or nanoworld words, symbols, images, and games. What do children today say about these artefacts that are used to represent molecular world entities? What are the material and social resources that can influence a child’s everyday and developing scientific ideas about ‘molecules’? How do children interact with these cognitive tools when given expert assistance? What meaning-making is afforded when children are socially and materially assisted in using molecular tools in early chemical and nanoworld thinking? Tool-dependent discursive studies show that provision of cultural artefacts can assist and direct developmental thinking across many domains of science (Schoultz et al., Human Development 44:103–118, 2001; Siegal 2008). Young children’s use of molecular artefacts as cognitive tools has not received much attention to date (Jakab 2009a, b). This study shows 6–11-year-old children expressing everyday ideas of molecular artefacts and raising their own questions about the artefacts. They are seen beginning to domesticate (Erneling 2010) the words, symbols, and images to their own purposes when given the opportunity to interact with such artefacts in supported activity. Discursive analysis supports the notion that using ‘molecules’ as cultural tools can help young children to begin ‘putting on molecular spectacles’ (Kind 2004). Playing with an interactive game (ICT) is shown to be particularly helpful in assisting children’s early meaning-making with representations of molecules, atoms, and their chemical symbols.  相似文献   

19.
Innovative professionals rely on a specific ways of thinking to solve the nonstandard problems that come up in practice (Goodwin, Am Anthropol 96(3):606–633, 1994; Schön, The reflective practitioner: how professionals think in action, 1983; Educating the reflective practitioner: toward a new design for teaching and learning in the professions, 1987; Sullivan, Work and integrity: the crisis and promise of professionalism in America, 1995). The professions have reproductive practices for transmitting these ways of thinking, such as practica (Schön, Educating the reflective practitioner: toward a new design for teaching and learning in the professions, 1987). In this paper, we examine the learning relationship between a mentor and team of college students through an ethnographic study of a game design practicum at a European arts school. To examine the role that the mentor played in this practicum, we use two theoretical constructs. Epistemic frames—the configurations of the skills, knowledge, identities, values, and epistemologies that professionals use to think in innovative ways—provide a model for examining professional expertise (Shaffer, Comput Educ, 46(3):223–234, 2006a). Epistemic network analysis (ENA) (Shaffer et al., Int J Learn Media, 1(2):33–53, 2009) is a method for quantifying changes in epistemic frames (Shaffer, The bicycle helmets of “Amsterdam”: computer games and the problem of transfer, 2010). Our results here suggest that the mentor leads the team on a path that illuminates the nature of learning to think professionally, as well the function of a mentor in that process. We argue that the mentor, rather than providing a direct map to a professional vantage point, scaffolds aspects of the epistemic frame of game design that, in turn, aid in the development of a more professional frame. Using ENA to understand the way that mentors help coach learners to develop epistemic frames should be useful for further studies of professional education, as well as for studies of apprenticeship-based programs for youth.  相似文献   

20.
Multicultural counseling competencies (MCCs) have typically been measured with instruments designed for and normed on mental health professionals – for example, MCCTS-R; Holcomb-McCoy (Professional School Counseling 4:195–208, 2001); MCI; Sodowsky et al. (Journal of Counseling and Development 41:137–148, 1994); D’Andrea et al. (Journal of Counseling & Development 70:143–150, 1991). One published instrument specifically assesses school counselor MCCs – MCCTS-R; Holcomb-McCoy (Professional School Counseling 4:195–208, 2001) – but it does not conform to ASCA standards (2010, E.2). Following a set of validation procedures, an instrument designed to specifically assess school counselors’ multicultural counseling competencies was created that conforms to American School Counselor Association and Association for Multicultural Counseling and Development standards. Its creation is detailed here and the resulting instrument is presented for examination and consideration.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号