用矿灯如何发送紧急停车信号？
参考答案：
急速上下摆动矿灯发送紧急停车信号。
— What's your friend like?
— _____. [ ]
A. He is English.
B. He's a teacher.
C. He is tall and thin.
D. He likes sports.
在华夏银行办理银行承兑汇票承兑业务的客户应资信状况良好，（）年内无实质性违约记录。
A.1
B.2
C.3
D.5
