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【单选题】
若直流串励电动机的磁路已饱和,它的转矩( )。A.
与励磁电流成正比
B.
与励磁电流成反比
C.
与励磁电流平方成正比
D.
与励磁电流无关
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举一反三
【简答题】A very young boy, Tom, lives a long way from the city. One day he goes to the city to visit his friend, Jack. Jack asks Tom to have lunch together. They go into the restaurant and sit down at a table....
【单选题】听力原文：M: I' m afraid that I don' t like your hat, really. I think it' s a bit old fashioned for you. It goes well with the shoes, though. W: Old fashioned? It's back in fashion now. It's you that's old...
A.
The man thinks the hat fit well with the shoes, and he likes it.
B.
Although the hat is old fashioned, the woman likes it very much.
C.
The woman thinks the hat is fashionable but the man is out of fashion.
D.
The man doesn' t like the hat because it was not nice with the shoes.
【多选题】水热 - 溶剂热与固相反应的主要区别是:
A.
水热 - 溶剂热适用液相反应机理；固相反应适用界面扩散机理。
B.
水热 - 溶剂热合成材料在液相条件下，能提供相对稳定、均匀的反应条件；固相反应受反应物颗粒细度的影响较大。
C.
水热 - 溶剂热合成材料能合成完美的晶体；一般容易生成非整数化学计量比化合物。
【简答题】如何推行清洁生产？
【单选题】根据材料，回答问题。The story goes that some time ago， a man punished his 3-year-old daughter for wasting a roll of gold wrapping paper. Money was 21 and he became upset when the child tried to 22 a box to put ...
A.
poor
B.
rich
C.
tight
D.
loose
【简答题】阅读理解。 Jack is a twenty-year-old young man. Two years ago, when he finished middle school, he found work in a shop. Usually he works until ten o'clock at night. He is very tired when he gets home. Afte...
【简答题】阅读理解。根据短文，正确的写T，错误的写F。 Li Ping is a Young Pioneer (员). He goes to the wildlife park (野生动物园). When he waits for a bus at the bus stop, he finds a watch on the road (马路). He asks some people, 'Whose ...
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