【单选题】听力原文:M: Do you know what Henry's phone number is? W: Oh, Henry's phone number? I don't have my address book on me... hmmm... I can't think of it right off hand. Q: What does the woman mean? (8)
A.
She lost Henry's number.
B.
She forgot to write Henry's number on her hand back.
C.
She doesn't know Henry's number.
D.
She can't remember Henry's number.
【单选题】听力原文:(W—Gene Man—Henry) W: Have you heard the good news, Henry? M: What's that? W: It's going to be cold tonight and tomorrow there will be snow. M: No, I hadn't heard. Why do you think that's good ne...
A.
Gene and Henry can swim.
B.
Gene does not like cold weather.
C.
It is going to snow tomorrow.
D.
Gene has snow tires on his car.
【简答题】下面指数的运算正确的是:A. B. C. D.
【简答题】PLC采用 工作方式,其工作过程一般分为五个阶段,即 、 、 、 、 。
【多选题】PLC采用 工作方式,其过程可分为五个阶段: , , , 和 ,称为一个扫描周期。
【简答题】PLC 采用 工作方式是 PLC 区别于微机的最大特点。
【简答题】.PLC 采用 工作方式执行程序。一个扫描周期主要包括 、 、和 三个工作过程。