A.She is busier than the man.
B.She is not as busy as the man.
C.She is unable to help the man.
D.She is lucky not to work with the man.
第5题
机车鸣笛鸣示紧急停车信号的鸣示方式为()。
A.一长一短声
B.一长二短声
C.三短声
D.连续短声
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