Question

The webs that spiders(蜘蛛) build to catch insects seem weak. However, the strength of spider thread is greater than steel. Webs can even stand up to very strong storms.

In each spider web, some threads are sticky(粘的), but some are not. When a spider is moving on the web, it will not step on the sticky threads. After a time the silk will lose its stickiness and become unable to catch insects. Then, spiders usually eat their own web.

Now a team of scientists has worked out why the spider web is so strong. It is not just the strength of the thread, but the clever design of the web. The key to a web’s success is its ability to keep its shape and strength even after some of the threads break, say scientists at the Massachusetts Institute of Technology. The scientists found the thread itself has the ability to become softer or harder. So it can hold different types of heavy things.

In tests, scientists used three other strong materials(材料) made into the same webs. The spider thread was six times stronger than any other material. More surprisingly, when the scientists took away up to 10 percent of the threads from different places, the web didn’t become any weaker. Actually, it became up to 10 percent stronger.

The spider web’s clever design gives scientists many new ideas. The findings could help design safer buildings and even a new type of strong material. “It’s a really good chance,” said Markus Buehler, a professor at MIT. “It may give us some new ideas for engineering.”

 

1.According to the passage, the spider web is strong because .

a. the spider’s thread is sticky

b. the thread has a lot of strength

c. the web has a clever design

d. the web can keep the strength forever

A. ab B. ac C. bc D. bd

2.In paragraph 4, the scientists’ tests show that .

A. the spider’s thread is stronger than the other three materials

B. the spider’s thread is the strongest material in the world

C. the spider’s thread can be as soft or hard as it needs to be

D. taking away some spider thread makes the web weaker

3.From the last paragraph, we learn that .

A. people can use spider webs to build houses

B. the findings give people new ideas for buildings

C. there are many reasons why the spider web is so strong

D. Professor Buehler will make a new type of material

4.Which of the following would be the best title for the passage?

A.How spiders catch insects

B. How spiders design webs

C. Spiders are clever designers

D. Webs are stronger than steel

 

Answer 1

1.C

2.A

3.B

4.D

【解析】

試題分析：蜘蛛網(wǎng)看起來(lái)很薄弱。然而實(shí)際上蜘蛛絲的強(qiáng)度比鋼鐵強(qiáng)。蜘蛛網(wǎng)甚至可以經(jīng)得住強(qiáng)烈的風(fēng)暴。測(cè)試表明，蜘蛛網(wǎng)比其他材料制成的網(wǎng)結(jié)實(shí)六倍。蜘蛛網(wǎng)巧妙的設(shè)計(jì)給了科學(xué)家很多主意。這些發(fā)現(xiàn)可以幫助設(shè)計(jì)更安全的建筑甚至新型結(jié)實(shí)的材料。

1.

2.細(xì)節(jié)理解題。根據(jù)文章第四段前兩句可知，科學(xué)家用另外三種結(jié)實(shí)的材料制成同樣的網(wǎng)，蜘蛛網(wǎng)比其他材料強(qiáng)六倍。所以選A。

3.細(xì)節(jié)理解題。根據(jù)文章最后一段一二句可知，蜘蛛網(wǎng)巧妙地設(shè)計(jì)給了科學(xué)家許多新主意，這些發(fā)現(xiàn)可以幫助人們?cè)O(shè)計(jì)更安全的建筑和新型的結(jié)實(shí)的材料。所以選B。

4.web，所以最合適的題目是D.

考點(diǎn)：社會(huì)類閱讀。