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【单选题】
低压断路器用于笼型电动机电路时，电磁脱扣器的瞬时整定电流为( )热脱扣器的额定电流。A.
1.5～2.5倍
B.
1.5～7倍
C.
4～7倍
D.
8～15倍
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皮皮学刷刷变学霸
举一反三
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A.
with normal
B.
to average
C.
with usual
D.
to usual
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A.
at a rate
B.
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【单选题】蛤蚧的功效是
A.
补肺气，助肾阳，定喘咳
B.
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C.
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D.
助肾阳，定喘嗽，益精血
E.
补肺气，助肾阳，定喘嗽，益精血
【单选题】Some children learn _____ slower ___________. It would be unfair to expect a child with learning difficulties to keep up with faster learners.
A.
a great deal of
B.
for the purpose of
C.
at a....rate
D.
go down
【单选题】Some children learn to play the guitar because their parents ______.
A.
play too
B.
think it's easy
C.
force them
D.
think it's useful
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