单项选择题

He was such a genius that he almost ______everything he did.

A．excelled in
B．excelled over
C．excelled about
D．excelled on
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单项选择题
We know from the passage that ______.
A．exposure to even tiny amounts of radiation is fatal
B．the effect of exposure to radiation is slow in coming
C．radiation is avoidable in space exploration
D．astronauts in spacesuits need not worry about radiation damage
单项选择题
Which of the following countries has not paid enough attention to the green issues
A．Norway.
B．France.
C．America.
D．Australia.
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