电动葫芦启闭闸门的操作步骤要求:无论大车行走还是小车起吊,发现(),应及时停车检查
A、异常情况
B、突发状况
C、特殊情况
D、意外情况
参考答案:A
温带海洋性气候分布较广的大洲是( )
A.非洲
B.北美洲
C.欧洲
D.亚洲
Parents should take seriously their children's requests for sunglasses _____ eye protection is necessary in
sunny weather. [ ]
A. because
B. though
C. unless
D. if