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【单选题】转子平行不对中主要引起径向振动,振动频率为旋转频率的 倍,同时也存在多倍频振动。
A.
1
B.
2
C.
3
D.
4
【判断题】电气设备工作时低于额定电压称为满载。
A.
正确
B.
错误
【单选题】However, Mr. Martin had no sooner moved into the prime minister’s residence in Ottawa’s Sussex Drive ______ things began to go wrong.
A.
as
B.
as when
C.
than
D.
until
【简答题】Practice reading the dialogue in Listening 1 with a partner. Change roles after you have read it once. Chen Lin : Good morning. You must be Mr Lohmann. Martin : Yes, that’s right. Chen Lin : I’m Chen ...
【简答题】Chen Lin: Good morning. You (1) be Mr. Lohmann. Martin: Yes, that 's right. Chen Lin: I'm Chen Lin, Mr Li's personal (2) . How do you do? Martin: (3) ? Chen Lin: How was your (4) ? Martin: Fine, but a...
【简答题】Listening 1 Meeting a business partner at the airpo Directions: Listen to this conversation and complete the sentences. Martin Lohmann from Buchner Hydraulics has flown to Shanghai to talk to Ming Li....
【简答题】电气设备工作时低于额定电压称为 。
【单选题】转子平行不对中主要引起径向振动,振动频率为旋转频率的 倍,同时也存在多倍频振动。A 1 B 2C 3 D 4
A.
1
B.
2
C.
3
D.
4
【简答题】组成 ( ) 的每个零件之间没有相对运动。
【简答题】Chen Lin Good morning. You must be Mr Lohmann. Martin Yes,( 1 ) . Chen Lin I’m Chen Lin, Mr Li’s personal assistant. (2) Martin How do you do? Chen Lin How was (3)? Martin Fine, but a bit full. Howe...
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