题目内容
1.Farmers use different kinds of soil conservation methods to protect their land from damage by farming and the forces of nature.One important form of soil conservation is the use of windbreaks.Windbreaks are barriers formed by trees and other plants with many leaves.Farmers plant them in lines around their fields.Windbreaks stop the wind from blowing soil away.They also keep the wind from destroying or damaging crops.They are very important for growing grains,such as wheat.
There have been studies done on windbreaks in parts of West Africa.It is found that grain harvests can be 20% higher in fields protected by windbreaks compared to fields without such protection.
However,windbreaks seem to work best when they allow a little wind to pass through.If the wall of trees and plants stops wind completely,then violent air movements will take place close to the ground.These movements will lift soil into the air where it will be blown away.For this reason,a windbreak is best if it has only 60% to 80% of the trees and plants needed to form a solid line.
An easy role to remember is that windbreaks can protect areas up to ten times the height of the tallest trees in the windbreaks.There should be at least two lines in each windbreak.One line should be large trees.The second line,right next to it,can be shorter trees and other plants with leaves.Locally grown trees and plants are best for windbreaks.
Windbreaks can protect land and crops from the wind.They can also provide wood products.These include wood for fuel and longer pieces for making fences.
24.If the wind is stopped completely,what will happen?A
A.Some soil will be blown away.
B.The wind will become stronger.
C.Some trees will be pulled up.
D.All the wind will be kept out.
25.If the trees in the windbreak are 20meters high,the area being protected isB.
A.20meters B.200meters
C.2,000meters D.2meters
26.We can learn from the text thatC.
A.windbreaks are popular in Africa
B.only trees can be planted in a windbreak
C.windbreaks help to produce better harvests
D.the best way to protect soil is building windbreaks
27.The author develops the passage by the following means EXCEPTD.
A.making comparison B.listing statistics
C.giving examples D.following time order.
分析 本文属于说明文阅读,作者通过这篇文章向我们介绍了防风林的 作用,向我们说明了防风林的重要性.
解答 24.A 细节理解题,根据第四段If the wall of trees and plants stops wind completely,then violent air movements will take place close to the ground.These movements will lift soil into the air where it will be blown away.可知如果风完全停止了,那么有些土壤会被吹走,故选A.
25.B 细节理解题,根据倒数第二段An easy role to remember is that windbreaks can protect areas up to ten times the height of the tallest trees in the windbreaks.可知防风林可以保护的区域是防风林中最高树木高度的十倍,20*10=200米,故选B.
26.C 推理判断题,根据第二段They also keep the wind from destroying or damaging crops.They are very important for growing grains,such as wheat.可知防风林对谷物也有很大的作用,故选C.
27.D 细节理解题,通读全文可知本文中作者通过比较,列举统计,举例子来阐述,但是作者没有按照时间顺序,故选D.
点评 考查学生的细节理解和推理判断能力.做细节理解题时一定要找到文章中的原句,和题干进行比较,再做出正确选择.在做推理判断题时不要以个人的主观想象代替文章的事实,要根据文章事实进行合乎逻辑的推理判断.
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A.Penguins have to wrestle with problems in District 13.
B.A team of crime-fighters uncovers a criminal plot in Big Hero.
C.President Coin pushes Katniss to protest Peeta.
D.The voyage through the wormhole is a considerable challenge.
57.The similarity that exists in the four films is thatB.
A.each of them is a branch of film series
B.all of them are concerned with positive energy
C.they all have the best actors and actresses in the world
D.the four films all have something to do with exploration.
A. | slightly | B. | approximately | C. | globally | D. | harmfully |
(26)C,the butterfly seemed to stop making any progress.It appeared as if it had gotten (27)Bit could and it could go no farther.The old man felt (28)A for the little butterfly inside so he decided to help the little (29)D.He took a pair of scissors and cut the remaining bit of cocoon open.The butterfly then came out easily,but it had a (30)Abody and small,shriveled (枯萎的) wings.
The man continued to watch the butterfly because he expected that,(31)C,the wings would expand and be able to (32)D the body,which would slim down in time.Neither happened!(33)A,the butterfly spent the rest of its life crawling around with an unusually fat body and shriveled wings.It never was able to fly.
What the man,in his (34)B and eagerness,did not understand was that the restricting cocoon and the struggle (35)Dto get through the tiny opening were nature's way of forcing fluid (液体) from the body of the butterfly into its wings(36)C it would be ready for flight once it achieved freedom.
Sometimes (37)Dare exactly what we need in our life.If nature allowed us to(38)A life without hardships or obstacles,it would weaken or even damage us over time both physically and mentally.We would not be as (39)B as we could have been.Give every opportunity a chance,leave no room for (40)C.have a great day,great life,and struggle a little.Then fly!
21.A.advancing | B.transforming | C.growing | D.developing |
22.A.gently | B.randomly | C.cheerfully | D.casually |
23.A.took over | B.watched over | C.checked over | D.turned over |
24.A.spot | B.passage | C.opening | D.butterfly |
25.A.expand | B.push | C.shrink | D.force |
26.A.Suddenly | B.Immediately | C.Eventually | D.Gradually |
27.A.as much as | B.as far as | C.as long as | D.as deep as |
28.A.sympathetic | B.responsible | C.shameful | D.regretful |
29.A.victim | B.companion | C.slave | D.creature |
30.A.swollen | B.powerful | C.awkward | D.flexible |
31.A.in any way | B.by any chance | C.at any moment | D.in any case |
32.A.protect | B.control | C.lift | D.support |
33.A.In fact | B.In general | C.In conclusion | D.In short |
34.A.concentration | B.kindness | C.curiosity | D.willingness |
35.A.arranged | B.intended | C.guaranteed | D.required |
36.A.provided that | B.if only | C.so that | D.as though |
37.A.pains | B.failures | C.sufferings | D.struggles |
38.A.go through | B.adapt to | C.care for | D.reflect on |
39.A.potential | B.strong | C.optimistic | D.energetic |
40.A.embarrassment | B.arguments | C.regrets | D.sorrow |