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【单选题】
直流电动机电磁转矩的性质是()。
A.
驱动转矩
B.
制动转矩
C.
由电流方向确定
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举一反三
【简答题】The teacher told us that practice made perfect.
【判断题】涡流室式柴油发动机有预热系统,因为在冷态起动或在低温下驾驶它可能达不到合适的压缩热度。( )
A.
正确
B.
错误
【单选题】建筑起重机械产权备案的范围包括建筑施工现场使用的()、物料提升机和高处作业吊篮等机械设备。
A.
塔式起重机和混凝土搅拌机
B.
施工升降机和打桩机
C.
塔式起重机和施工升降机
D.
混凝土搅拌机和打桩机
【简答题】打桩设备包括___、___和___。
【简答题】打桩设备包括( )、( )和动力装置。
【单选题】The teacher told us the sun ______ in the east.
A.
rises
B.
rose
【简答题】用所给词的适当形式填空。 1. The teacher told us not to go ( swim) alone in the river. 2. The Women's World Cup _ (not begin) until 1991 when China hosted it in  Guangzhou. 3. Jackie Chan is a famous) _ (act).
【简答题】听短文,选择正确选项 1. The teacher told the pupils____. A. to keep quiet after class B. not to draw on the wall C. not to stand against the wall 2. After class, David ____. A. went back home B. picked up a pie...
【简答题】Correct the errors in the following sentences. 1. The teacher told us that practice made perfect.
【简答题】I.Correct the errors in the following sentences.(改错题) 1.The teacher told us that practice made perfect.
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