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209HS型转向架橡胶堆定位器的性能试验与研究
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作者 姜卫星 沈培德 《铁道车辆》 1996年第9期11-16,共6页
在介绍橡胶件静、动态试验要求的基础上,对209HS型准高速转向架的ZSD3型橡胶堆定位器的高、低温试验和静、动态试验工况及试验结果进行了分析。通过试验比较,选择了适合高、低温要求的橡胶堆定位器的材质,保证了定位器的性能。
关键词 转向架 试验 铁路 车辆 ZSD3型 橡胶堆定位器
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College Students’Quest for Lexical Study and Application
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作者 陈章霞 邹李炜 《海外英语》 2021年第1期263-264,共2页
What every brick is for grande building,vocabulary is for the foundation laid for the acquisition of one language.It follows that authentic expressions are justified by the mastery of its application in a specific con... What every brick is for grande building,vocabulary is for the foundation laid for the acquisition of one language.It follows that authentic expressions are justified by the mastery of its application in a specific context.Therefore,it is crucial to delve into the process of vocabulary acquisition,that is,the effect of students’input and output.Words’meanings varied in distinct contexts.Starting from the above two aspects,this paper illustrates the understanding of learning words through examples,so as to optimize the word learning method to achieve twice the result with half the effort. 展开更多
关键词 English vocabulary Positive and negative words The context in which words are used
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Words with Uncommon Positive Forms
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作者 Andrei Khalip 《当代外语研究》 2003年第3期29-30,共2页
下列单词有对应肯定形式的词,只要将其否定前缀去掉即是,但其肯定形式 的词远远不如这些否定形式的词常用。
关键词 肯定形式 words with Uncommon Positive Forms
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