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【多选题】
减轻触头接通过程中的机械振动方法有( )。A.
减轻触头初压力
B.
减轻触头的质量
C.
增大触头初压力
D.
减轻触头的运动速度
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举一反三
【单选题】One of the biggest problems in food production has always been that people have no reliable access to exact information, ____________ is often the case in China.
A.
that
B.
what
C.
which
D.
it
【单选题】It has always been a problem to decide whether 'popular music' is music which represents the people or is simply music that the people like. The same problem of【C1】______exists with jazz. So many diff...
A.
definition
B.
classification
C.
imitation
D.
discussion
【简答题】What has each generation of Americans always been struggling for?
【单选题】She has always _____ her father and felt highly honored for what he has been doing. [ ]
A.
looked up to
B.
looked down upon
C.
looked around for
D.
looked forward to
【简答题】What has the author’s belief about changes always been?
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