单项选择题

The scientists began to accumulate data.

A. collect
B. handle
C. analyze
D. investigate
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单项选择题
Usually, in an attack of influenza, the patient's limbs ache.
A．hurt
B．soften
C．get numb
D．get hot
单项选择题
He cannot discriminate between a good idea and a bad one.
A．judge
B．assess
C．distinguish

D．recognize
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