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【简答题】
按排气压力分,压力在400000Pa,属于哪类压缩机?
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参考解析:
知识点:
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举一反三
【判断题】按聚合物结构分类,缩聚反应可以分缩合反应、线型缩聚和体型缩聚
A.
正确
B.
错误
【简答题】我国证券交易所是按公司制方式组成。( )
【判断题】按聚合物结构分类,缩聚反应可以分缩合反应、线型缩聚和体型缩聚。
A.
正确
B.
错误
【判断题】我国证券交易所是按公司制方式组成
A.
正确
B.
错误
【单选题】已知两个正弦量为 , ,则( )
A.
u1比u2超前30度
B.
u1比u2滞后30度
C.
u1比u2超前90度
D.
不能判断相位差
【单选题】What does the writer say about the classified advertisements that used to be put in the papers?
A.
They used to be voluntary.
B.
They used to use display type.
C.
They were all of the same size.
D.
They were more formal.
【单选题】What does the writer say about the classified advertisements that used to be put in the papers?
A.
They used to be voluntary.
B.
They used to use display type.
C.
They were all the same size.
D.
They were more formal.
【单选题】已知等差数列 满足 ,则公差d 是 ( )
A.
1
B.
-1
C.
2
D.
-2
【单选题】The modern city is quite different from what it ____ some ways. A . was used to be in B . used to by C . used to be in D...
A.
. was used to be in
B.
. used to by
C.
. used to be in
D.
. was used to being in
【单选题】已知两个正弦量为 ,则
A.
B.
C.
D.
不能判断相位关系
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