单项选择题

The ______ of such I. Q. tests full of questions on American culture was not questioned at that time.

A．significance
B．validity
C．efficiency
D．justification
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单项选择题
They found that an individual tends to conform to a ______ group judgment even when that judgment is obviously in error.
A．unanimous
B．singular
C．coherent
D．versatile
单项选择题
So far as the food industry is concerned, the processing of sheep and lambs is relatively ______ in the United States, accounting for only about 7 percent of meat-packing production.
A．irrelevant
B．appropriate
C．negligible
D．redundant
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