单项选择题

A．tightening
B．intensifying
C．focusing
D．fastening
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单项选择题
A．bindingB．convincingC．restrainingD．sustaining
A．binding
B．convincing
C．restraining
D．sustaining
单项选择题
A．illogicalB．illegalC．improbableD．improper
A．illogical
B．illegal
C．improbable
D．improper
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