题目内容

Knowledge make() ; ignorance make proud.
A economical
B friendly
C kindness
D humble

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试述β射线敷贴治疗皮肤病的原理及适应证。

The policemen were told to be alert() the dangers they were facing.
A to
B in
C on
D at

Those pictures reveal() us a wonderful world under water.
A on
B at
C to
D in

He owed his success to luck more than()capacity.
A on
B to
C in
D at

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