维修人员在底坑时，应将（）开关断开.
A.安全钳
B.限速器
C.底坑停止
D.轿顶停止
参考答案：C
What has started as a Chicago morning program in 1984 has now turned into one of the most popular daytime chat shows ever _____ on TV.
A．tobe seen
B．tosee
C．seeing
D．has been seen
国际多式联运
