题目内容
Which of the following is NOT mentioned as a cause of the problem discussed in the passage？
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Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听力原文： Hi. My name is John Hilton. I'm your teaching assistant for Chemistry, Professor Smith's class. Let me explain a little about this lab section. It's a required meeting, twice a week. I expect you to do all the experiments and keep the results in your lab notebook. I' II collect the notebooks every two weeks. You' 11 be graded on your lab notebooks, your attendance, and quizzes. But the most important information I want to give you today is about the safety procedures.
First of all, you must wear shoes that cover your feet in the lab. That means you can' t wear thongs or sandals. Tennis shoes are OK. Aim, don't wear clothes that have loose, baggy parts, like long scarves and necklaces or loose belts. They could get caught in something or fall into a liquid.
Another important safety precaution is cleaning up. Be sure to put the waste in the correct containers. We call' t mix liquid with paper. This is extremely important. I don't want any fires in this room.
You are responsible for washing out your own lab equipment and putting it away. If you don' t do this, I will deduct points from your grades. I'm not going to clean up after you.
OK. That's about all for this meeting. Our first regular class will be next week. Be sure to get a lab notebook before then. Also, let Professor Smith know that you are attending this section.
(27)
A．The local advertisements.B．The Information Agency.C．The Sunday newspaper.D．The radio
听力原文：W: Did you catch our very own Professor Stiller on TV last night？
M: I almost missed it! But my mother just happened to be watching at home and gave me a call.
Q: What does the man mean？
(15)
听力原文：M: Hey, Jane! What's so interesting？
W: What？ Oh, hi, Tom! I'm reading this fascinating article on the societies of the Ice Age during the Pleistocene period.
M: The Ice Age？ There weren't any societies then--just a bunch of cave people.
W: That's what people used to think. But a new exhibit at the American Museum of Natural History shows that Ice Age people were surprisingly advanced.
M: Oh, really？ In what ways？
W: Well, Ice Age people were the inventors of language, art, and music as we know it. And they didn't live in caves; they built their own shelters.
M: What did they use to build them？ The cold weather would have killed off most of the trees, so they couldn't have used wood.
W: In some of the warmer climates they did build houses of wood. In other places they used animal bones and skins or lived in natural stone shelters.
M: How did they stay warm？ Animal-skin walls don't sound very sturdy.
W: Well, it says here that in the early Ice Age they often faced their homes toward the south to take advantage of the sun—a primitive sort of solar heating.
M: Hey, that's pretty smart.
W: Then people in the late Ice Age even insulated their homes by putting heated cobblestones on the floor.
M: I guess I spoke too soon. Can I read that magazine article after you're done？ I think I'm going to try to impress my anthropology teacher with my amazing knowledge of Ice Age civilization.
W: What a show-off!
(20)
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