计算机监控系统的开关量信号输人至画面显示的响应时间不大于多少（）
A.3s
B.2s
C.1s
参考答案：B
----Sorry to say I can’t play basketball with you this afternoon, for I’ll have to prepare for the coming examination.
-----________. Have some fun!
A. Don’t be a wet blanket B. It’s a no-brainer
B. Don’t pull my leg D. We’re all ears
集装箱船理货业务是如何进行的？
