关键词:语法教学

如果你希望一个写文章不通的人看了两本语法书就把文章写通,一个不会写文章的人看了两本语法书就会写文章,那你一定要失望.语法万能和语法无能是两种极端的看法,但后者常常是由前者转变过来的. ——吕叔湘《语法三问》,《语文学习》,1953年第8期     

课堂纪律与课堂管理

搞好教学必须要有良好的课堂秩序,这就要求教师在课堂上管理得当。然而,不少教师对课堂纪律与课堂管理深感头痛,这也许是教师碰到的最为棘手的问题。在有些学校里,学生不遵守纪律的现象特别严重。但     

秋天踏着车来了

这是一个疾风劲吹的日子,在黄昏前我漫步的田野上空,流云好像飞速翻动的书页匆匆飘过。但云缝中露出的蓝天却更加明亮,更加湛蓝。转眼间,蓝天被划成无数条明亮闪烁的小径从东向西蜿蜒而去,西边的天空泛起从未见过的各式各样的绚丽霞光……     

猫和两个麻雀

有一只猫,他和一个很年轻的麻雀同年出生,从小就跟他住在一起。鸟笼和猫篮都有同样的家神庇护着。猫往往和麻雀嬉戏:一个用嘴奋击,一个用爪相戏。可是猫总是饶恕他的朋友,只给他很轻的处罚:他不忍使用利爪,惟恐伤害     

假如今天是我生命中的最后一天

假如今天是我生命中的最后一天。我该如何利用这最后、最宝贵的一天呢首先,我要把一天的时间珍藏好,不让一分一秒的时间滴漏。我不为昨日的不幸叹息,过去的已够不幸,不要再赔上今日的运道。     

Failure to obtain value enhancement by within-trial contrast in simultaneous and successive discriminations

The present research tested the generality of the “work ethic“ effect described by Clement, Feltus, Kaiser, and Zentall (2000). In Experiment 1, we trained 10 pigeons on a pair of either simultaneous or successive discriminations. One discrimination followed a high-effort requirement (20 pecks to the center key) and the other followed a low-effort requirement (1 peck). Contrary to Clement et al.’s results, we found that preferences between the S⁺ and S⁻ stimuli in transfer tests depended on the event that initiated the trial: Pigeons preferred the stimulus from the baseline discrimination whose initiating event was most dissimilar from that preceding the test trial. Preferences were similar but less extreme in the successive condition. In Experiment 2, we investigated whether test preferences depended on the amount of training. A total of 12 pigeons were trained on a pair of simultaneous discriminations, except that test sessions were scheduled after every three baseline sessions. Preferences increased across test sessions but were similar to those in Experiment 1. Together with Vasconcelos, Urcuioli, and Lionello-DeNolf (2007a), our study represents a second failure to replicate Clement et al.’s work ethic effect. The finding that preference depends on the event that initiates the test trial suggests that choice probes may not provide unambiguous assessments of stimulus value.     

西欧和美国学生的思想政治教育

现阶段,在较大的资本主义国家里,普通学校学生思想政治教育的理论与实践,都在发生明显的变化。本文拟对美国、英国、法国和联邦德国所发生的这种变化的最一般趋势作一描述。为此,将探讨下列问题:资产阶级精神“中立”教育和公开教育理论家的辩论;资产阶级间接思想政治教育的思     

自由是一种承诺

在一个应当为您所提倡的“伦理共识”而奋斗的世界上,宗教感情的复活如何才能与之相适应?     

关于我区全面推行素质教育的几点思考

本着重从强化思想政治素质、建设高素质的教师队伍、培养德、智、体、美全面发展的跨世纪接班人等方面论述了在我区全面推行素质教育的重要性和必要性。     

Modeling water and carbon fluxes above summer maize field in North China Plain with back-propagation neural networks

INTRODUCTION Dynamics of carbon and water vapor fluxesexchange between the atmosphere and the ecosystembiosphere, depend on complex and non-liner interplayamong physiological, ecological, biochemical andedaphic factors and meteorological conditions (Jarvis,1995; Leuning et al., 1995). There are many studiesquantifying the fluxes across different time and spacescales as well as assessing the environment con-straints on them by some kinds of biophysical orempirical models whose resul…