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【单选题】
在机械传动中,理论上能保证瞬时传动比为常数,能缓冲减振,并能起到过载安全保护作用的是( )。A.
带传动
B.
链传动
C.
齿轮传动
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皮皮学刷刷变学霸
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【简答题】B类地址154.19.2.7的哪一部分是网络地址( )
【单选题】It can be concluded from the passage that____.
A.
Jerry was not a good swimmer
B.
Jerry failed to gain acceptance by the other boys
C.
Jerry was on holiday abroad
D.
Jerry was not on good terms with his mother
【单选题】What should be the best title for this passage?
A.
Real Food and Pleasure Food.
B.
Reducing Weight.
C.
Limit Your Consumption of Pleasure Food.
D.
How to Choose Food When You Are Hungry.
【单选题】Which is the best one for preserving food in the following methods?
A.
Put the food ill a cold place.
B.
Cook the food well.
C.
Dry the food by sun.
D.
It is not told.
【简答题】The author ____________________ that 'pies are the best comfort food ever'.
【简答题】Jerry Green went to spend a year at the South Pole Station (南极站)as the only doctor in 1998 when she 47.While working at the station that March. she discovered that there was a hard lump (肿块)in her sto...
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