— People should stop using their cars and start using public transport.

— _____ . The roads are too crowded as it is.

A．All right

B．Exactly

C．Go ahead

D．Fine

密封风机加热器自动启动条件必须同时满足（）。

A、 密封风机正常

B、 密封风机加热器正常

C、 任意一台密封风机运行延时60s

D 、密封风机出口管线有泄漏