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1.
邮资机符志的使用情况 万国邮联规定,邮资机符志使用红色盖印。上海现行邮资机符志都盖印红色(大红、紫红或红褐色),未见其他颜色。国家邮政局1999年《关于加强邮资  相似文献   
2.
If you drive along the Chang'an Avenue eastward in Beijing and pass through skyscrapers in CBD, you will soon encounter a complex of ancient buildings of Ming and Qing styles - China Red Sandalwood Museum. Behind the immense door lies an ancient art palace. This is the world's largest museum of red sandalwood architectures and carvings and also the only private museum in China that has "China" in its name, which receives the most heads of states and foreign government officials.  相似文献   
3.
相对来说,写真手法是较为容易掌握的。因事物是客观存在的,只要依循着看得见、摸得着的事实,进行“描”和“画”就行了。而对于那些抽象的、不易理解的、生疏的、看不见摸不着的无形的事物,要写得形象可感,依靠写真手法,单纯地描摹,就不够了。这就要借助另一种手法,也就是化无形为有形的手法,比兴手法。 比兴,这里不是指修辞格,而是作为一种表现手法。比兴包括比和兴两种手法。二者常常一起使用,统称为比兴手法。为了便于阐述,下面分别谈谈。──比。 比,就是类比,打比方,比喻。拿人们熟悉的、已知的、有形的、可感的事物,…  相似文献   
4.
目的:外泌体及其内容物是各种肝脏疾病的潜在生物标志物。本研究探索外泌体及其内容物在肝移植排斥反应及预后中的作用。创新点:本研究发现外泌体及内含物半乳糖凝集素-9(galectin-9)在肝移植术后排斥及预后预测中发挥重要作用。方法:分别从急性排斥和肝功能稳定患者提取外泌体,进行分离、鉴定并检测其内含蛋白。候选蛋白通过在73个急性排斥病人和63个肝功能稳定病人切除肝的组织芯片中进行验证。最后将蛋白表达量和临床参数纳入Kaplan-Meier生存率和Cox回归分析。结论:外泌体来源的galectin-9可作为预测肝移植术后排斥发生及预后的生物学指标。  相似文献   
5.
The United States is extremely diverse include whites, blacks, Native Americans, Alaskans, in the racial and ethnic backgrounds of its citizens, which Asians, Pacific Islanders, and Hispanics. Such a diverse combination of different racial populations makes the characteristics of accessibility and diversity in American higher education important. The necessity of educating such a vast and diverse population in a climate of competing social demands on limited public resources presents the United States with serious challenges. This paper discusses and analyzes educational transition, innovation and future development in American Higher Education.  相似文献   
6.
Human-specific duplicated genes contributed to phenotypic innovations during the origin of our own species, such as an enlarged brain and highly developed cognitive abilities. While prior studies on transgenic mice carrying the human-specific SRGAP2C gene have shown enhanced brain connectivity, the relevance to humans remains unclear due to the significant evolutionary gap between humans and rodents. In this study,to investigate the phenotypic outcome and underlying genetic mechanism of SRGAP2C,...  相似文献   
7.
Oculomotor behavior has been shown to be correlated with mental disorders in clinics, making it promising for disease diagnosis. Here we developed a thorough oculomotor test toolkit, involving saccade, smooth pursuit, and fixation, allowing the examination of multiple oculomotor parameters in monkey models induced by psychoactive drugs. Eye movements were recorded after daily injections of phencyclidine(PCP)(3.0 mg/kg), ketamine(0.8 mg/kg) or controlled saline in two macaque monkeys. Both drugs ...  相似文献   
8.
<正>Water is crucial to processes of both Earth’s surface and interior, facilitating plate tectonics and making the Earth a habitable planet [1]. Seawater penetrates into oceanic lithosphere through fractures on seafloor and migrates along faults and pores. The hydration process weakens the crustal strength and alters mantle properties. Specifically, it influences seismicity by changing the pressure and friction of rocks, and triggers magma generation by lowering the mantle solidus and mant...  相似文献   
9.
Background:Prolonged sitting and reduced physical activity lead to low energy expenditures.However,little is known about the joint impact of daily sitting time and physical activity on body fat distribution.We investigated the independent and joint associations of daily sitting time and physical activity with body fat among adults.Methods:This was a cross-sectional analysis of U.S.nationally representative data from the National Health and Nutrition Examination Survey2011-2018 among adults aged ...  相似文献   
10.
Jiaxing County, located in the Yangtze Delta in southeast China, is a land of abundance and home of silk. For many local peasants in Jiaxing, painting is an important means of artistic expression.Most of the artists labor in the field during daylight and paint at night. Their paintings are known for rustic styles, bright colors and plain designs, drawing extensive attention and praise of the art circle nationwide.  相似文献   
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