W: We have been working on this paper for several hours and I feel really tired.
M: Why don’t we just stop and breathe some fresh air outdoors? We have plenty of time to finish it tomorrow.
Q: What does the man mean?（）

听力原文：W: You don't look smart this morning. I can see you're not happy.M: I had never expected this would have happened to me. We had a power failure at home last night.W: How come? Did anyone in the family, do anything wrong?M: You've guessed it. It was all my father's fault.W: What did he do?M: I was just watching a wonderful football feature program on TV when the lights suddenly went out.W: Why was that?M: You see, we'd just had our dinner. My mother was washing my jeans in the washing machine. And the air-conditioners were on in both rooms. I was in my room watching TV.W: What was your father doing then?M: He wanted to warm his tea in the microwave oven. He plugged it in and the fuse broke. And everything stopped all of a sudden. W: Your next-door neighbor is an electrician, isn't he? M: Yes. Luckily, he happened to be at home. He came and fixed it up. But it was half an hour later. I had already missed a lot. W: It was an annoying experience for a sports fan like you. But don't miss the basketball finals this evening. Make sure there is no power failure tonight.Questions 23 to 25 are based on the conversation you have just heard.23. Why does the man look depressed this morning?24. What was the immediate cause of the power failure?25. What will the man probably do tonight?(20)A．He failed in a power test yesterday.B．He never expected himself to be happy.C．It was because of his father's fault.D．He missed about 30 minutes of a program. 点击查看答案

在检查站4．1你在图4—4中绘出了一条需求曲线；在检查站4．2你又在该图上绘出了一条供给曲线。返回到图4—4，回答下面的问题。 a．如果棉花糖的价格是1美元，市场处于什么状态? b．如果棉花糖的价格是3美元，市场处于什么状态? c．棉花糖的均衡价格和均衡数量是多少? 点击查看答案