主旨大意题(三)

A

本文词数:245 参考时间:2'35''

Scientists in the United States say they have developed cloth that can produce electricity. Researchers say they can get enough electricity out of the cloth to power small electronic devices such as an mp3 player, and the invention can also be put to use in aerospace exploration1.

Researchers at the Georgia Institute of Technology made the special cloth. The so-called nanogenerator cloth contains small special wires. It can be used to make shirts and curtains, and creates small electrical charges2 out of the slightest movement. These can charge batteries and then be put to use, according to scientist Zhong Lin Wang.
     He says electricity is produced when the wires are brought into contact with even the slightest motion —someone’s walking, for example, or even a heartbeat. "Each wire produces a small amount of energy. We have millions of billions of these kinds of wires. Added together, they can produce a lot of electricity,"he notes. Wang says the nano-generator can put out 80 millwatts3 per square meter of fabric, enough to power small electronic devices.

But he also wants to put this Microfiber-Nanowire System to bigger and broader uses, such as powering the communications equipment of soldiers in remote areas. It can also be used on the outside of aircraft.

"As for daily life, if you have a tent, for example, it could produce electricity whenever the wind blows,"he adds. The potential uses of the equipment are more than we can imagine now.

Notes:

1. aerospace exploration 航空航天探索

2. charge n. 电荷

3. millwatt 毫瓦

词数:149 参考时间3'00''

Read the passage and choose the best answer for each question.

1. The first two paragraphs mainly tell us_____.

A. the scientists are using their invention in aerospace exploration

B. there is a kind of cloth that can change movement into electricity

C. how the cloth changes motion into electricity

D. a special kind of cloth that can produce electricity has been invented

2. The main purpose of the passage is to _____.

A. describe the uses of the nano-generator cloth in daily life

B. introduce the new achievements of researchers

C. give a brief introduction to nano-generator cloth

D. describe the future of the Microfiber-Nanowire System

3. Which would be the best title for the passage？

A. Scientists Make Cloth that Produces Electricity

B. Change the Slightest Movement into Electricity

C. The Microfiber-Nanowire System

D. A New Technology to Use Bodily Movements to Make Electricity

B

本文词数:279 参考时间:3'10''

You can tell a lot about people by looking at their hair. Scientists have found a way to figure out where a person is from and where that person has been from their hair. The findings could help solve crimes, and be put to other uses.

Water is important to the new tech-nique. It makes up more than half an adult human’s body weight. Our body breaks water down into parts —hydrogen1 and oxygen2. Atoms3 of these two elements end up in our fingernails and hair.

But not all water is the same. Hydrogen and oxygen atoms can have different weights. Different forms of a single element are called isotopes4. And the tap water of different pl
aces contains unique amounts of the heavier or lighter isotopes of hydrogen and oxygen.

Even though people drink a lot of bottled water these days, the scientists have found that hair reflects the concentrations5 of hydrogen and oxygen isotopes in the local tap water. That’s probably because people usually cook their food in the local water. What’s more, most of the other liquids we drink —including milk and soft drinks —contain large amounts of water from sources within their region.

The new technique can’t point out exactly where a person is from, because similar types of water appear in different regions that cover a broad area. But authorities can now use the information to analyze hair samples from criminals and narrow their search for clues.

Notes:

1. hydrogen n. 氢

2. oxygen n. 氧

3. atom n. 原子

4. isotope n. 同位素

5. concentration n. 浓度, 含量

词数:86 参考时间2'00''

Read the passage and choose the best answer for each question.

1. The best title for the passage would be _____.

A. Hair Detectives

B. High Technique

C. Great Use of a New Technique

D. The Water in Hair

2. Paragraphs 3 and 4 are mainly about _____.

A. the different kinds of water in hair

B. how the water in one’s hair varies according to where one lives

C. how hair can give a lot of information

D. the importance of tap water

新阅题读型

本文词数:261 参考时间:6'30''

Please put the paragraphs in the correct order.

1. Today they report having great dexterity1 with their artificial2 hands from Touch Bionics, which is run by Stuart Mead. "We’ve managed to take technology from other fields, bring it together, and produce the world’s first truly bionic3 hand,"says Mead.

2. After being fitted and tested, Juan Arredondo could do things much more easily than before. Lindsay Block says she has more choices now. "This hand opens so many possibilities. I’ve never really had one like it. It seems to be able to do everything that a real hand can."

3. A British company called "Touch Bionics" has developed the world’s first commercially bionic hand. The company introduced the hand in Britain in September 2006 and in the U.S. in July 2007. Users say the electronic bionic is a great improvement over artificial hands.

4. David Glow of Touch Bionics explains that until now, artificial hands are limited, "You can turn a key in a lock, but electric hands couldn’t do that."

5. Lindsay Block was born without a lower left arm, and has been fitted with artificial replacements since childhood. Donald McKillips lost his hand in an accident when he was a young man. And retired U.S. Army Sergeant Juan Arredondo lost his hand to a bomb in Iraq.

6. "The hand works using the signals the brain sends when its owner wants to do something," he explains. "The hand can open and close, and the really wonderful thing about it is the way it adapts to objects of various shapes."

Notes:

1. dexterity n. (手)灵巧, 敏捷

2. artificial adj. 人造的, 假的

3. bionic adj. 仿生学的,利用仿生学的

本期参考答案

A) 1-3 D C A

B) 1-2 A B

阅读新题型3

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