单项选择题


A．require
B．acquiring
C．acquired
D．required
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单项选择题
A．independentlyB．repeatedlyC．logicallyD．generally
A．independently
B．repeatedly
C．logically
D．generally
单项选择题
A．effectiveB．passiveC．relativeD．expressive
A．effective
B．passive
C．relative
D．expressive
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