单项选择题

Modern scientists hold that truth is not something that we first ______ and then explore in all its ramifications, but something found at the end of long investigations.

A．postulate
B．vindicate
C．identify
D．ratify
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单项选择题
The world's governments have done ______ nothing to combat the threat of nuclear accidents.
A．rarely
B．nearly
C．barely
D．intrinsically
单项选择题
Why did you ______ such a good job when jobs are so hard to get
A．throw about
B．throw off
C．throw up
D．throw out
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