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【单选题】
78各类轴承中径向尺寸最小的是()A.
心球轴承
B.
沟球轴承
C.
柱滚子轴承
D.
针轴承
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举一反三
【简答题】How many times are lung problems more common in Cubatao than in other places?
【单选题】Such things are not common for me, _________ they are unusual.
A.
instead
B.
but
C.
so
D.
as a result
【简答题】What do these places have in common?
【单选题】What do these places have in common?
A.
People there live longer than anywhere else on earth.
B.
People there live shorter than anywhere else on earth.
【简答题】A．Common sense may be different in various places or times. B．There is no doubt that virus is the cause. C．It's almost impossible to define what is common sense. D．People often take contradictory atti...
【简答题】数据库的完整性指数据的( )和( )。
【简答题】小明的爸爸有—副眼镜，小明观察发现：爸爸看书时常常会戴上眼镜，看电视或看远处物体口才又会摘下眼镜． （1）请你猜想小明的爸爸配戴的眼镜是什么透镜制成的?并说明你猜想的理由． （2）请设计一个实验来验证你的猜想．
【单选题】They are too _______ for me; I prefer the plain ones.
A.
ordinary
B.
fancy
C.
imaginary
D.
common
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