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虫）。它看起来就像没有壳的蜗牛，其爬行过的地方会留下一条细细的踪迹。它要使用大量的能量制造粘滑的粘液，以便在其上爬行。移动同样的的距离，老鼠只需要其所耗费能量的十二分之一。
科学家们认为，由于蛞蝓（鼻涕虫）利用能量的效率很低，所以它的生活必然受到一定的限制。换句话说，它们都被迫把自己束缚在很小的区域之中来搜寻食物和寻找合适的生活条件。人类曾经面临过这样的问题吗?
【答案解析】
1.【解析】［D］属同义转换题，本题是一种排除选择题。根据题干中的中心词“movement to do something”，可以将答案定位在小标题“Moving to Survive”下第二段的前两句话，“Like the shark, most animals use movement to find food. They also use locomotion to escape enemies, find a mate, and explore now territories”。该句与题干是一种同义转换，选项A、B和C在原文中均有提及，所以不是正确选项；答案D在原文没有提及，所以是正确答案。
2.【解析】［B］属细节推断题。题干考查汽车、火箭和潜艇的例子是为了说明什么，其中的“examples of automobiles, rockets and submarines”是关键词，可以将答案定位在文章小标题“Moving to Survive”下第三段的前两句话，“Humans have the added advantage of using their various inventions to move about in just about any kind of environment. Automobiles, rockets, and submarines transport humans from deep oceans to as far away as the moon”，第二句话所举例子正是为了说明第一句话的内容，这与B项意思一致，而其它选项在文中均未提及。
3.【解析】［A］属细节推断题。分析题干，本题考查鲨鱼在水中快速游动的关键是在什么。其中的“key”是关键词，可以将答案定位在小标题“Skin Is the Key”下首段的第一句话，“The biologists discovered that the skin of the shark is the key to the animal’s high efficiency in swimming through the water”，这与选项A完全一致，所以直接选择A即可。其它选项在文中均有提及，但是都不符合题干的要求。
4.【解析】［D］属细节推断题。题干中的“the Duke University scientists”是关键词，可以将答案定位在小标题“Skin Is the Key”下第二段的第一句话，“The Duke University biologists have found that the greatest stretching occurs where the shark bends its body while swimming”。这与选项D的内容完全一致，所以答案选D项，而其它选项原文均为提及，为干扰项。
5.【解析】［C］属细节推断题。题干中“a belted radial tire”是关键词，可以将答案锁定在文章小标题“Source of Energy”下第一段的第三句话，“Just as a radial tire is inflated by pressure, so, too, is the area just under the shark’s collagen ‘radials’”。其中的“just as”和“so”正说明了两者的相似之处在于“inflated by pressure”，所以答案应该是C。选项A和B是两者的不同之处，选项D在文中没有提及。
6.【解析】［A］属细节推断题。题干中的关键词是“a laminar flow”，所以可以将答案锁定在文章小标题“Dolphin Has Speed Record”下，根据该节第一段的倒数第三、四句话，“Normally when a fish or other object moves slowly through the water, the water flows smoothly past the body. This smooth flow is known as laminar flow.”。题干是对这两句话的改写，所以正确答案是A选项。其它三个选项的意思均不符合“a laminar flow”的定义，与题干要求不符。
7.【解析】［C］属同义转换题。题干中“a slug”和“a mouse”均为关键词，可以直接定位在小标题“Other Animals Less Efficient”下第一段的第二句话，“It uses so much energy ... a mouse traveling the same distance uses only one twelfth as much energy”。题干是对该句的同义改写，所以正确答案是C 12 times，其它选项均与原文内容不符。
8. 【解析】feeling the vibrations of a struggling prey鲨鱼靠感受猎物游动的震动来发现猎物。
9. 【解析】collagen fibers 在Skin Is the Key中，第二、三句话，The fibers are called collagen fibers。
10. 【解析】some fantastic involuntary changes 在Source of Energy中，第二段倒数第一句话就是本题答案。
Part III Listening Comprehension
Section A
11. W:Oh, you are back. This is a pleasant surprise. It is not lunch time yet. Are you through work?
M:No, I forgot some papers this morning.
Q:Why did the man return home?
【解析】［D］这是一对夫妻的对话。妻子说：你回来啦，真是个惊喜，还没到午饭时间呢，你工作完了么？丈夫说：没有，我今早忘了带一些文件。可见，丈夫回家来是为了取些文件。本题需要间接推理。
12.M:Two ten-cent stamps and four eight-cent stamps, please.
W:Here you are. That will be fifty- two cents.
Q:Where did this conversation most probably take place?
【解析】［D］关键词在于听出stamps邮票。男士说：我要两张十分的邮票和四张八分的邮票。女士说：给你，一共52美分。显然，这是在邮局买邮票时发生的一段对话。
13.M:You said the paper you’ve just finished fell on the floor, but I can’t find it.
W:Look under the desk, back in the corner.
Q:What does the woman mean?
【解析】［C］男士说：你说你刚完成的论文掉地上了，但我没找到。女士说：看看桌子下面，后面的角落。因此，女士的意思是要他在桌子下面再仔细找找。
14. M:The train is late. When will it arrive?
W:They say it’s late for 25 minutes, so it should be here at 11: 46.
Q: When will the train arrive?
【解析】［C］本题中女士提到火车晚点25分钟是个干扰项，她说的后半句话即是答案so it should be here at 11: 46。
15. M:I would like to move to the suburbs, but I don’t have enough money to pay the high taxis.
W:I wish you could. It’s nice to live there.
Q:Why isn’t the man moving to the suburbs?
【解析】［D］本题为推理题，对话中没有直接给出答案，需要推理。男士说：我很想住郊区，但我没那么多钱付高额的打的费。打的费高只能是因为郊区离工作的地点太远的缘故。
16.W:Jack, would you like to go to the club with us tomorrow night?
M:I wish I could, but I have to work on my term paper.
Q:Is Jack going to the club?
【解析】［A］女士问：杰克，明天晚上跟我们一起去俱乐部吧？男士说：我很想去，但是我必须写我的学期论文。由此可见，杰克是不会去俱乐部的。
17. M:Think it over carefully, you must have left it somewhere.
W:But the problem is that I have to have it now. I need it to use my car, and when I get home, to open the door.
Q: What happened to the woman?
【解析】［B］对话中的女士丢了钥匙，但是对话里却没出现钥匙keys这一词。男士说：仔细想想，你一定把它落在哪儿了。女士说：问题是我现在需要用它，我要用它来开车，回家后还要用它开门。那她丢的一定是钥匙了。
18. W:Weren?t you nervous when the professor called on you in class?
M:I?d say I was shaking all over.
Q:How did the man feel when he was called on?
【解析】［A］女士问：当教授在班上点到你的时候你不紧张吗？男士说：我浑身都在抖。shaking all over说明男士非常担忧和害怕。
Now you’ll hear two long conversations.
Conversation One
W:Let’s go in here and order some coffee while we look at your pictures.
M:Good idea. We’d both like coffee, please. OK, here’s one of Ed’s, my roommate. I took this picture right after we had arrived at the school this fall. We had just met, in fact. And this was our room of the dormitory while we were unpacking all our things. What a mess!
W:You certainly had a lot of boxes. How did you ever find room for everything?
