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: Hi, Tom. How's your chemistry paper going? M: It's coming along. But I've been staring at this computer screen for hours and my eyes hurt. W: Yeah, doing that can make your eyes feel really dry and tired. You should take a break. M: I can't. I have to get this paper written. It's due tomorrow. W: You know, I read about computers and eye problems recently. The article says that they are usually caused by not blinking your eyes enough. M: Blinking? I thought I just needed new glasses. W: Nay. When you blink, the movement of closing and opening your eyes, even thought it happens really fast, helps moisten your eyes. It's the lack of moisture that causes the problem. M: Oh, that makes sense. But what does it have to do with the computer? W: People who use computers tend to stare at the monitor and blink less often than they normally would. That leads to dry irritated eyes. M: Well, that certainly helped mine feel now. They really hurt. W: The article I read about office workers found that the workers averaged 22 blinks a minute when relax, but just 7 a minute while looking at text on a computer screen. M: Wow, that's quite a difference. W: They also kept their eyes open wider, which means that moisture evaporated more quickly. M: I wonder if using some kind of eye drops would make them feel better. W: That might help. But the best prescription is to take a break and rest your eyes. M: Ok. Let's go and get some coffee. I can finish this later tonight. Why is blinking important? A.It helps the eyes absorb eye drops. B.It helps to keep the eyes moist. C.It improves a person's concentration. D.It prevents a buildup of chemicals in the eyes.
A. 听力原文:W: B. W: C. M: D. W: E. M: F. W: G. M: H. M: I. W: J. M: K. W: L. M: M. W: N. M: O. Why P.It Q. B.It R. C.It S. D.It T.