A.两子系统同时同步运行,当联机子系统出错时,它退出服务,由备份系统接替B.备份系统处于电源
A. 两子系统同时同步运行,当联机子系统出错时,它退出服务,由备份系统接替
B. 备份系统处于电源开机状态,一旦联机子系统出错,立即切换到备份系统
C. 两子系统交替处于工作和自检状态,当发现一子系统出错时,它不再交替到工作状态
D. 两子系统并行工作,提高机器速度,一旦一个子系统出错,放弃并行工作
SECTION A CONVERSATIONS
Directions: In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow.
听力原文:W: What's the problem?
M: I can't figure out how to put the page numbers on. I've done everything and they aren't showing up.
W: Let's see. Did you press Shift, F87
M: Yes, I did that. Then ! hit P for page and N for number.
W: That's good. Did you type in the page number where you want the numbering to start?
M: Yes. I typed the number 1.
W: Right. Did you press Enter?
M: Yes.
W: How about F7 to return to the document?
M: I did that. But no numbers show up on the screen.
W: Un-huh, did you print it?
M: No, I don't want to print it until I see the numbers.
W: Well, that's the problem then. The numbers don't show up on the screen. But they will on the primed copy. Let's try that.
M: Okay. You do it this time, and I'll watch.
W: Well, I'll do if' as you want, but it would be better if you let me talk you through it.
M: I don't know.
W: Really. Once you've done it with someone coaching you, it's easier to do it on your own. Don't worry. This is my job.
M: Oh, all right. Shift F8.
W: Now hit P for page and N for number.
M: And the page number I want to start with is number 1.
W: Great! Just press Enter, then F7 to return to the document, and you're all set to print. Then you'll see those numbers.
What prompted this conversation?
A. The man is learning how to use a computer.
B. The woman is showing the man how to put page numbers on a document.
C. The man is printing a document.
D. The man is using his computer to do mathematical functions.