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【单选题】
三相异步电动机产生的电磁转矩是由于( )
A.
定子磁场与定子电流的相互作用
B.
转子磁场与转子电流的相互作用
C.
旋转磁场与转子电流的相互作用
D.
转子磁场与定子电流的相互作用
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参考答案:
举一反三
【单选题】在房屋建筑中的屋架,他的端部支承在柱子上,并将预埋在屋架和柱子上的两块钢板焊接起来,这样就可以阻止屋架的移动,但因焊缝的长度有限,对屋架的转动限制作用很小,因此,工程中常把这种装置视为( )。
A.
活动铰支座
B.
中间铰链
C.
滚动铰支座
D.
固定铰支座
【单选题】— How many people came to the cel eb ra ti o n of the tenth anni versary of the company? 一 I can’t say it exactly. Maybe there were ten _____ people.
A.
dozens of
B.
dozen
C.
dozens
D.
dozen of
【简答题】Once upon a time there were two brothers who lived near each other. One day, they had a 16 because of some small things. And neither was willing to 17 each other. One morning, there was a knock at doo...
【单选题】There were many talented actors out there just waiting _______. prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
to discover
B.
discovered
C.
being discovered
D.
to be discovered
【单选题】There were two boys in the lab, did the experiment successfully.
A.
the clever of whom
B.
the cleverer or whom
C.
the clever of them
D.
the more clever of them
【单选题】某公司资产总额为100000元,负债除应付账款项目外为45000元,所有者权益为49000元,则该公司应付账款应为( )元。
A.
55000
B.
6000
C.
51000
D.
4000
【简答题】根据首字母提示补全单词。 1. The doctor told her to exercise more to keep f______. 2. There were a lot of f______ visitors coming to Beijing in August 2008. 3.  We made a r______ to study hard last term. 4.  There...
【判断题】命题公式p∨(q∧¬r)是重言式.
A.
正确
B.
错误
【单选题】拣货作业分为两部分()。
A.
信息处理和配送业务
B.
入库检查和配送业务
C.
信息处理和拣货作业
D.
入库检查和拣货作业
【简答题】缺词填空。 I have lived in the countryside since I was a child. There were many k   1 of birds there when I was young. Every morning, lots of sparrows liked singing and j   2 in the trees outside my window...
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