题目内容
14.Dujiangyan is the oldest man-made water system in the world,and a wonder m the development of Chinese science.Built over 2,200 years ago in what is now Sichuan Province in Southwest China,this amazing engineering achievement is still used today to irrigate over 6,000 square kilometres of farmland,take away floodwater and provide water for 50cities m the province.In ancient times,the region in which Dujiangyan now stands suffered from regular floods caused by overflow from the Minjiang River.To help the victims of the flooding,Li Bing,the region's governor,together with his son,decided to find a solution.They studied the problem and discovered that the river most often overflowed when winter snow at the top of the nearby Mount Yulei began to melt as the weather warmed.
The simplest fix was to build a dam,but this would have ruined the Minjiang River.So instead Li designed a series of channels built at different levels along Mount Yulei that would take away the floodwater while leaving the river flowing naturally.Better still,the extra water could be directed to the dry Chengdu Plain,making it suitable for farming.
Cutting the channels through the hard rock of Mount Yulei was a remarkable accomplishment as it was done long before the invention gunpowder and explosives.£1Bing found another solution.He used a combination of fire and water to heat and cool the rocks until they cracked and could be removed.After eight years of work,the 20-metre-wide canals had been carved through the mountain.
Once the system was finished,no more floods occurred and the people were able to live peacefully and affluently.Today,Dujiangyan is admired by scientists from around the world because of one feature.Unlike modem dams where the water is blocked with a huge wall,Dujiangyan still lets water flow through the Minjiang River naturally,enabling ecosystems and fish populations to exist in harmony.
24.What are the benefits of Dujiangyan according to the first paragraph?A
A.Reducing flooding and watering farmland.
B.Protecting the mountain and reducing flooding.
C.Watering farmland and improving water quality.
D.Drying the river and supplying cities with water.
25.What was the main cause of the Minjiang Rivers flooding?B
A.Heavy rains.B.Melting snow.
C.Low river banks.D.Steep mountains.
26.How was Li Bing able to break through the rocks of Mount Yulei?C
A.By using gunpowder.
B.By flooding the rocks with water.
C.By applying a heating and cooling technique.
D.By breaking the rocks with hammers and spades.
27.Why is Dujiangyan greatly admired by scientists today?A
A.It preserves much of the natural river life.
B.It took very little time to complete the project.
C.The building techniques used were very modem.
D.It has raised the living standards of the local people.
分析 本文介绍了中国古代水利工程都江堰的历史以及作用,优点.
解答 24.A 细节理解题.由第一段this amazing engineering achievement is still used today to irrigate over 6,000 square kilometres of farmland,take away floodwater and provide water for 50cities m the province.可知.这个工程成今天仍然使用于农田灌溉,带走洪水,并提供50个城市用水,故选A.
25.B.理解推断题.由第二段They studied the problem and discovered that the river most often overflowed when winter snow at the top of the nearby Mount Yulei began to melt as the weather warmed.可知,当冬天附近山顶的雪开始融化时,这条河常常溢出,故选B.
26.C.细节理解题.由倒数第二段He used a combination of fire and water to heat and cool the rocks until they cracked and could be removed,可知使用火和水来加热和冷却岩石可以使它们破解,故选C.
27.A.理解推断题.由最后一段Dujiangyan still lets water flow through the Minjiang River naturally,enabling ecosystems and fish populations to exist in harmony可知,都江堰仍然允许岷江水流自然通过,使生态系统和鱼类种群十分和谐自然,故选A.
点评 这篇文章非常简单,先看问题,再带着问题仔细阅读短文,理解了全文内容,很容易选出正确答案.阅读注意事项:1、关注连词,分析文章逻辑结构.2、聚焦代词,明辨指代关系.3、抓住关键词语,利用平行结构、上下文(包括定义、释义、举例、对比、标点)进行判断与推理.
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A.No problem. B.Buy a new one. C.Is that expensive? D.What's troubling you? E.Mm…,but I still hope… F.How much does an ordinary bike cost? G.You can save up the money,say 5a week,then in just over a year… |
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22.A.Interested | B.Disabled | C.shocked | D.confused |
23.A.Helped | B.decided | C.afforded | D.meant |
24.A.refused | B.loved | C.expected | D.bored |
25.A.Difficulties | B.questions | C.drops | D.ideas |
26.A.Because | B.though | C.so | D.but |
27.A.Arms | B.head | C.hands | D.legs |
28.A.Singing | B.walking | C.flying | D.listening |
29.A.achieve | B.decide | C.receive | D.accept |
30.A.set | B.settle | C.do | D.share |
31.A.peaceful | B.afraid | C.active | D.happy |
32.A.hold | B.lend | C.wave | D.move |
33.A.pain | B.loneliness | C.sadness | D.fear |
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35.A.held on | B.went through | C.picked up | D.turned on |
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38.A.strong | B.noisy | C.weak | D.silent |
39.A.needed | B.believed | C.explained | D.missed |
40.A.always | B.often | C.never | D.Seldom |