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【单选题】
下列不是带传动缺点和运动特点的是( )A.
传动的外廓尺寸较大
B.
需要张紧装置和会打滑
C.
传动效率较低，寿命短
D.
一般带速为5-30m/s，传动比i>7，传动效率为0.9-0.95
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举一反三
【单选题】What _____ will it make whether he knows this or not? [ ]
A.
sense
B.
difference
C.
mistake
D.
use
【单选题】What is NOT suggested about T-Mart?
A.
It will make a special spot in T-Mart for environmental products.
B.
It wants to call customers' attention to environmental issues.
C.
It will make another Wildlife Center.
D.
It will support the Wildlife Center continuously.
【简答题】What will NOT happen if you don’t get enough sleep? A) You will feel stressed while working. B) You will have no sense of exhaustion. C) You can make costly mistakes. D) You will have low productivity...
【单选题】What can we learn from the conversation?
A.
The man caught the train.
B.
The man missed the train.
C.
The woman missed the train.
【单选题】What will not make cells age?
A.
Oxygen.
B.
Wear and tear.
C.
Lack of oxygen.
D.
Less physiological fuel.
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