填空题
有甲、乙、丙三种商品,购甲3件,乙7件,丙1件,需3.15元;购甲4件,乙10件,丙1件,需 4.20元.若购甲、乙、丙各1件,则需（）元.
【参考答案】
1.05
热门
试题
未分类题
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 F8?M: Yes, I did that. Then I 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 showed up on the screen.W: Unhuh. 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 be on the printed copy. Let's try that.M: Okay. You do it this time, and I'll watch.W: Well, I'll do it 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 fight, Shift F8.W: Now hit P for page and N for number.M: And the page number I want to start with which 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.(23)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.