【单选题】【消耗次数：1】
将直流电动机的电源两极相交换，电动机将____。
①
短路
②
开路
③
停转
④
反转
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【简答题】
直流电动机的作用是[填空]。
随机题目
【单选题】
某股份有限公司共有甲、乙、丙、丁、戊、己、庚七位董事。某次董事会会议，董事甲、乙、丙、丁、戊、己参加，庚因故未能出席，也未书面委托其他董事代为出席。该次会议通过一项违反法律规定的决议，给公司造成严重损失。该次会议的会议记录记载，董事戊在该项决议表决时表明了异议。根据《公司法》的规定，应对公司负赔偿责任的董事是（ ）。
①
董事甲、乙、丙、丁、戊、己、庚
②
董事甲、乙、丙、丁、戊、己
③
董事甲、乙、丙、丁、己、庚
④
董事甲、乙、丙、丁、己
【判断题】
答题说明：句子没有语法错误请选择“正确”，有语法错误请选择“错误”Thats the very thing I have been looking for.
①
正确
②
错误
【判断题】
答题说明：句子没有语法错误请选择“正确”，有语法错误请选择“错误”She kept weeping, while she calling her lovers name.
①
正确
②
错误
【判断题】
答题说明：句子没有语法错误请选择“正确”，有语法错误请选择“错误”I regret not having worked harder at school.
①
正确
②
错误
【多选题】
She____________________ that we should develop the skills.
①
suggest
②
suggested
③
propose
④
proposed
【多选题】
We_____________ protect the rights (权利) of the people.
①
should
②
ought to
③
must to
④
dare
【多选题】
------ Why did she visit Africa?------ She went there____________________ .
①
for research work
②
to do research
③
to gather information
④
to collect information
【单选题】
As man moves into the space age, the study of biological rhythms is of increasing____________ to travellers, pilots, the armed forces and astronauts.
①
importance
②
important
③
importantly
④
import
【单选题】
Europeans believed that they weresuperior ____________ other people.
①
than
②
to
③
with
④
at
【单选题】
Before Ford introduced the assembly line, each car was built by hand and such a process was, of course, very____________ .
①
slow
②
quick
③
fast
④
rapid