[单选题]CRH1A型动车组转向架轴箱上还装有用于不同功能的轴箱辅助装置,主要包含以下部件:①碳刷装置(保护接地或牵引回流) ; ②速度传感器(WSP,); ③ATP速度传感器; ④轴温报警装置 A. LKJ1和LKJ2 B. LKJ10和LKJ20 C. LKJ100和LKJ200 D. LKJ1000和LKJ2000
参考答案:A
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第1题: [单项选择]按贫血的MCV/RDW分类法,缺铁性贫血属 A. 小细胞均一性贫血 B. 小细胞不均一性贫血 C. 正常细胞均一性贫血 D. 大细胞均一性贫血 E. 大细胞不均一性贫血 参考答案:B
第2题: [单项选择]______give us help is welcome. A. Who ever B. Whoever C. No matter who D. Those who 参考答案:B 答案解析:[解析] 能作主语且符合语法的只有选项B。
第37题: [单项选择]The millions of calculations involved, had they been done by hand, ______ all practical value by the time they were finished. A. could lose B. would have lost C. might lose D. ought to have lost 参考答案:B 答案解析:这是一个与过去事实相反的虚拟语气句,从句had they been done by hand插在主句中,采用倒装形式省略了连词if,表示非真实条件,主句中有明确的时间状语by the time the