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【判断题】
直流电动机受潮，绝缘电阻下降过多时，应拆除绕组，更换绝缘。()A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】对于 135 单反 相机来说,焦距 为( )m m的 镜头约定俗成地成了标准镜头。
【单选题】The farmer had to wear heavy boots in the winter because the fields were so wet and ______ .
A.
earthy
B.
muddy
C.
soiled
D.
dusty
【简答题】完形填空。 A wolf went to a farm. It ate the farmer's 1 . The farmer was angry. He had a gun (枪). He 2 to kill (杀死) the wolf. The wolf 3 away. It saw Mr Bell on the way. It asked the man for 4 . Mr Bell wa...
【简答题】任务型阅读。 There was a farmer. He had four sons. 2 The farmer was very worried about his sons, but he didn't know what to do. The man grew old and fell ill. When he was dying (垂死的), he told all his sons t...
【简答题】作业:专题综述报告 (学号尾号单数做第一题,双数做第二题) 1、激光制导技术的发展 2、激光雷达原理及应用 提纲参考: (1)阐述其在军事应用背景; (2)介绍该技术或系统的发展情况,包括发展历史、现状和发展方向; (3)详细阐述基于该技术的典型系统的结构组成、工作原理、性能指标,以及关键技术等; (4)建议写出自己对该技术方向的理解。 要求:两周时间,交电子版,逻辑清晰,内容充实,字数不少于20...
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