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? |
