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【单选题】
已知某的压缩系数a 1-2 =0.5MPa -1 ，在100kPa压力作用下压缩24小时，该的孔隙比为0.96，则在200kPa压力作用下压缩24小时，该的孔隙比为：A.
0.88
B.
1.02
C.
0.43
D.
0.91
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【单选题】He should________his attention________the main problems. [ ]
A.
aim; with
B.
pay; on
C.
focus; on
D.
concentrate; with
【简答题】阅读理解。 By far the most common difficulty in study is failure to get down to regular concentrated work.This difficulty is much greater for those who do not work to a plan and have no regular rout...
【单选题】The new teacher was very quick to _________ the rules of the schoolA．adapt toB．addict toC．concen
A.
27. The new teacher was very quick to _________ the rules of the school A．adapt to
B.
addict to
C.
concentrate on
D.
depend on
【单选题】9 What makes a major success in Los Angeles is the strength of his public support.
A.
concentration
B.
intensity
C.
conservation
D.
stress
【单选题】By far the most common difficulty in study is simple failure to get down to regular concentrated work. This difficulty is much greater for those who do not work to a plan and have no regular routine o...
A.
the failure to keep to a routine of methodical and intensive work
B.
changing from one subject to another
C.
unwillingness to follow a systematic plan
D.
applying oneself to a subject only when one feels inclined
【单选题】The greatest danger is fatigue at the wheel. Some music can ________ you into concentration loss.
A.
contribute
B.
lull
C.
cause
D.
conduce
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