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阅读下面文字,完成后面提出的 41~44 题1亿8千万年前,自然界就开始了它最有创造性的工程设计。那时,圆蛛(蜘蛛一种)就织出了能有效地捕捉飞虫的圆形网。这样柔弱的一张网是怎样分散这么大的动能?这张网能够捕捉到多大飞虫而蛛丝不断?究竟是由于它的丝好还是它的结构好呢?为了解这些问题,英国牛津大学物理学家唐纳德·艾德蒙兹、生物学家弗里兹·沃尔拉斯和结构工程师洛雷恩·林用计算机模型分析了蜘蛛网结构。“我们试着分析了这张网设计方法”,艾德蒙兹说,“我们编制了一套程序,让汽车向整张网撞去并将它撞破,然后分析这种变形作用。”研究人员将单根丝、丝是怎样连接以及昆虫撞击网这些实验资料都输入了计算机。“如果蜘蛛网抵挡不住昆虫撞击,于是要么昆虫突破这网,要么被弹出,好像在蹦床上弹跳一样。”艾德蒙兹说,“通过模拟,我们意外地发现,空气动力学引起衰减在捕捉昆虫上起了很大的作用。在昆虫这一动量规模上,空气阻力起了很大作用。当整张网在空气中来回摆动时能量被分散了。”为了证实计算机模拟的结果,他们三个又进行了实验。“我们用聚苯乙烯泡沫塑料作炮弹轰击了真正蜘蛛网,”沃尔拉斯说,“在这种情况下,我们发现空气是很黏滞的,就像在水中拖拉绳一样。”科学家们还分析了网平衡力和张力独一无二的几何形态,证明力被分配到整张网面之上。林说,“为了解决结构问题,建筑学家和工程师们总是在不断地寻找新方法。实际上,大自然就是最好的老师,例如,蜘蛛网不但结构美观,而且力学分配极为合理”。第 41 题 文章首句中“最有创造性工程设计”指的是什么?()

A.蜘蛛

B.人类建筑

C.森林

D.蜘蛛网

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更多“阅读下面文字,完成后面提出的 41~44 题 1亿8千万年前…”相关的问题
第1题
阅读下面文字,完成后面提出的 41~44 题。人与生物圈计划中国有,世界其他国家也有。目的是寻求同一个答案——为什么人们在享受自己获得的和创造的财富时,会时时受到大自然种种惩罚?因为在土壤侵蚀、沙漠化、滥伐森林、越来越多的物种濒临灭绝、环境污染等所导致的生态系统退化中,已经意识到能登月球、造核武器的人类,还没有真正揭开人与生物圈之间的秘密,对于人的自身生产和人的经济行为应该如何与生存环境相协调、相适应,还缺乏足够的认识。联合国针对全球日益严重的人口、资源和环境的挑战,提出以保护人类赖以生存的地球环境为宗旨的人与生物圈计划,受到世界各国的格外拥护和支持。作为该计划理事国之一的中国,自1972年参加起就抱着极大的热情。国务院于1978年正式成立了相应的计划组织实施机构——UIY与生物圈国家委员会,迄今全国有37个有关项目列入中国的人与生物圈计划,6个国家级自然保护区被批准加入国际生物圈保护区网。人与生物圈计划,已经成为跨地域、跨国界、联系百余个国家和地区的专家学者运用生态学方法研究人与环境相互关系的纽带,已经是为生物圈资源的合理利用和保护提供多学科、多领域依据的窗口。第 41 题 中国和世界其他国家都非常重视人与生物圈计划的原因是()。

A.揭开人与生物圈之间的秘密,人类才能创造更多的财富

B.人类发展与生态环境退化的严重矛盾教育人类自身

C.全球性的人口、资源、环境的挑战日益严重

D.人类在获得和创造财富的同时受到大自然的种种惩罚

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第2题
阅读下面的文字,完成后面题目。文段中的加点词,运用不正确的一项是()

A.挥洒自如

B.无论

C.陈词滥调

D.扼杀

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第3题
第二节 完型填空 阅读下面短文,从短文后所给的[A]、[B]、[C]三个选项中选择能填入相应空白处的最佳

第二节 完型填空

阅读下面短文,从短文后所给的[A]、[B]、[C]三个选项中选择能填入相应空白处的最佳选项。

It was already late【41】 we set out f or the next town, which was about fifteen miles away on【42】 side of the town.

There we felt that we【43】 find a bed for the night. It was getting dark【44】 after we left the village, but【45】 we met no one,【46】 we drove fast along the narrow road. As we climbed at times to see the road, I asked John, my friend,【47】 more slowly.

After we had【48】 for about twenty miles, there was【49】 no sign (标志) of the town which was marked【50】 the map. We were beginning to get worried.

(41)

A.if

B.when

C.because

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第4题
第二节 完型填空 阅读下面短文,从短文后所给的[A]、[B]、[C]三个选项中选择能填入相应空白处的最佳

第二节 完型填空

阅读下面短文,从短文后所给的[A]、[B]、[C]三个选项中选择能填入相应空白处的最佳选项。

Many students do not like to study history (历史) . They say that there are【41】 many names and dates to【42】 . But if we do not know about the【43】 , we cannot understand the present well. For example, if we wish to know how men【44】 to use fire, we have to know what men did【45】 the past to travel at night or to keep themselves【46】 in cold nights. Only a study of history will make us realize (意识到)【47】 everything we do today is the result of what【48】 people did in the past.

As we【49】 history, we learn many interesting【50】 . History helps us understand our present life better.

(41)

A.too

B.enough

C.nearly

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第5题
第二节 完型填空 阅读下面短文,从短文后所给的[A]、[B]、[C]三个选项中选择能填入相应空白处的最佳

第二节 完型填空

阅读下面短文,从短文后所给的[A]、[B]、[C]三个选项中选择能填入相应空白处的最佳选项。

Summer holiday camps (夏令营) for children began in the USA over sixteen years ago. Today there are【41】than 8,000 summer camps in the United States and every year【42】. four million children pass through their gates【43】June and August. Some【44】 by bus every day from the nearest town.【45】 stay as campers for one or two weeks. Quite a lot of children go off to camp【46】the whole of the summer holiday. The people there are young and【47】 There is good food and lots of interesting things【48】. In many camps children learn things【49】cooking and drawing pictures. Every evening there are camp fires and games. Everyone goes to bed【50】but happy.

(41)

A.more

B.many

C.much

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第6题
第二节 完型填空 阅读下面短文,从短文后所给的[A]、[B]、[C]三个选项中选择能填入相应空白处的最佳

第二节 完型填空

阅读下面短文,从短文后所给的[A]、[B]、[C]三个选项中选择能填入相应空白处的最佳选项。

Li Lei works in a farm tool factory. He and five of his friends are very interested in singing. So they have (41) a singing group which is called Happy Birds. They sing (42) songs both in Chinese and in foreign languages. They sing very (43) . The other workers and people (44) the villages around really like to hear them (45) . Now New Year's Day (46) here soon. The Happy Birds have been asked to (47) at different places. They'd (48) to go to all of them. (49) one friend has too much work and (50) may have to give up his holidays. The Happy Birds can't sing without him.

(41)

A.built

B.taken

C.formed

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第7题
第二节 完型填空 阅读下面短文,从短文后所给的[A]、[B]、[C]三个选项中选择能填入相应空白处的最佳

第二节 完型填空

阅读下面短文,从短文后所给的[A]、[B]、[C]三个选项中选择能填入相应空白处的最佳选项。

I shall always remember my tenth birthday. All my friends came【41】my birthday party.

When the time【42】near for me to be ready for the party, I【43】my birthday dress and went into the hall where every one was【44】for me. I saw a lot of lovely presents. They had been【45】for me by the guests.

A few minutes【46】, my parents brought my birthday cake (蛋糕) with ten candles (蜡烛) on it. I was then asked to cut【47】and the guests were served. Music【48】during the party. The guests were talking and laughing.【49】the party, I thanked my parents【50】holding such a lovely birthday party for me.

(41)

A.to

B.at

C.about

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第8题
阅读理解B易错题号()

A.41

B.42

C.43

D.44

E.45

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第9题
第二节 完型填空 阅读下面短文,从短文后所给的[A]、[B]、[C]三个选项中选择能填入相应空白处的最佳

第二节 完型填空

阅读下面短文,从短文后所给的[A]、[B]、[C]三个选项中选择能填入相应空白处的最佳选项。

Indians always shake(摇) their heads when they talk to others. (41) does not have the same meaning (42) "no". If someone wants to visit India, (43) should know this, (44) it will give him some trouble.

One day, a foreign officer went to India on business. He hired(雇佣) a car and an Indian to drive it.When he (45) the driver to send him to his office the driver shook his (46) at once. The officer repeated his order, and the driver (47) so again. At last, the officer, of course, got (48) . “ (49) dare you refuse(拒绝) my order?" he shouted. "Drive me to office immediately!"

The driver answered (50) quite a loud voice, too. "Yes, sir!" But he still shook his head at the sametime. Suddenly the officer realized that "No means Yes here!"

(41)

A.It

B.She

C.That

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