Scientists are trying to make the deserts ,which get very little rain, into good

Scientists are trying to make the deserts ,which get very little rain, into good

题型:不详难度:来源:
Scientists are trying to make the deserts ,which get very little rain, into good land again. They want to bring water to the deserts,so people can live and grow food. They are learning a lot about the deserts. But more and more of the earth is becoming desert all the time. Scientists may not be able to change the desert in time.
Why is more and more land becoming desert?Scientists think that people make deserts.People are doing bad things to the earth against the scientists’ wish.
Some places on the earth don’t get much rain. But they still don’t become deserts.This is because some green plants are growing there.Small green plants and grass are very important to dry places.Plants don’t let the sun make the earth even drier. Plants do not let the wind blow the dirt away.When a bit of rain falls,the plants hold the water. Without plants, the land can become desert more easily.
小题1:Deserts ____________ .
A.never have any plants or animals in them
B.can all be turned into good land before long
C.are becoming smaller and smaller
D.get very little rain
小题2:More and more land is becoming desert  because____________.
A.plants can’t grow there
B.there is not enough rain
C.people haven’t done what scientists wish them to do
D.scientists know little about the deserts
小题3:Small green plants are very important to dry places because ________
A.they don’t let the sun make the earth even drier
B.they don’t let the wind blow the soil away
C.they hold water
D.All of the above.
小题4:After reading this passage, we learn that _____________ .
A.plants can keep dry land from becoming desert
B.it is good to get rid of the grass in the deserts
C.all places without much rain will become deserts
D.it is better to grow crops on dry land than to cut them

答案

小题1:D
小题2:C
小题3:D
小题4:A
解析

试题分析:根据文章内容可知植物对于水土保持的重要性。
小题1:D 细节题。根据第一段第一句Scientists are trying to make the deserts ,which get very little rain说明D正确。
小题2:C 推理题。根据第二段最后一句People are doing bad things to the earth against the scientists’wish。说明人们的做法违背了自然规律,故C正确。
小题3:D 细节题。根据文章第三段2,3,4行.Small green plants and grass are very important to dry places.Plants don’t let the sun make the earth even drier. Plants do not let the wind blow the dirt away.When a bit of rain falls,the plants hold the water.说明ABC三项都是Small green plants的作用,故D正确。
小题4:A 推理题。根据文章第三段内容可知植物对于水土保持是非常重要的。故A正确。
点评:对于环保类短文考生已经非常熟悉,注意细节题的把握和理解,提升推理能力。
举一反三
We’ve heard about radiation from the damaged nuclear reactors in Japan reaching American shores. Experts say so far there is no reason to worry, and point out that we meet radiation every day. Where and how? NPR’s Renee Montagne posed that question to Peter Caracappa, a radiation safety officer and professor of nuclear engineering.
MONTAGNE: How many things emit radiation?
Dr CARACAPPA: Well, radiation and radioactive material is a part of nature. So everything that’s living has some amount of radiation coming from it—a very small amout. Plus there’s radiation in the ground and the air.
So the extremes are uranium in the soil to bananas?
Yes.
By the way, why do bananas have radiation?
Bananas have a lot of potassium(钾). And a small amount of potassium naturally is called potassium 40, which is radioactive
What’s the difference between radiation that’s harmful and not harmful?
Well, the term radiation can apply to a lot of different things. But the harmful radiation is ionizing(离子)radiation. It has enough energy that it can make chemical changes in material. We could get ionizing radiation from an X-ray, for example. It’s the kind of radiation that causes cancer.
The broader definition of radiation includes a lot of things that we call non-ionizing radiation. That includes everything like radio waves and visible light and your microwave.
So what then is the largest contributor of ionizing radiation?
For the natural sources of ionizing radiation, actually the biggest chunk of that tends to come from radon(氡), which is a radioactive material that is present in the air. It can become a concern when it builds up in low-lying areas of homes like basements.
Would it be fair to say that most people do not need to worry about the danger of being exposed to radiation?
I would say that the everyday exposure to radioation that we meet contributes an extremely tiny risk to our life or to our health compared to all of the other risks that we meet in our day-to-day life.
小题1:We can infer from the first paragraph that radiation is______.
A.rareB.powerfulC.dangerousD.common
小题2:The passage may be _______.
A.an interviewB.an argumentC.a talk show programD.a science report
小题3:Whether radiation is harmful or not depends on______.
A.whether it has a small amount of potassium
B.whether it changes chemical in materials.
C.whether it has energy to change materials
D.whether it is visible in life
小题4:The purpose of writing this passage is to _______.
A.advise on how to protect us from radiation
B.analyze what causes radiation in daily life
C.warn people of the danger of radiation
D.expect people not to fear everyday radiation

题型:不详难度:| 查看答案
Joker found one of the biggest diamonds in the world right in his own back yard. He sold the stone to a diamond dealer for over three hundred thousand dollars. In New York, the diamond was resold---this time for almost eight hundred thousand dollars. The true value of a diamond is never known until it has been cut. Once cut successfully, its value can increase a thousand times. It"s easy to understand why the owner of Joker"s diamond went to the best diamond cutter he knew, Kaplan. The cutter studied the diamond for twelve whole months.
When he felt he was ready to start work, he discovered a flaw (瑕疵) . He had to begin his calculations all over again, or he might have made the stone useless. Six months passed, and Kaplan finally said to the owner, “I am ready to start my work. There will be one excellent diamond that will be comparable one excellent diamond of first-class quality (质量)  " Kaplan waited a few more days until he felt he was in the best physical and mental (精神的) condition(条件) possible. He picked up his tools (工具) and held his breath as he made the diamond exactly as he promised.
小题1:Joker found one of the biggest diamonds in the world_________.
A.in a minuteB.at the foot of a big mountain
C.in his own back yardD.in a garage (汽车库)
小题2:A diamond dealer is a person ___________.
A.in the diamond businessB.who stole diamonds
C.who cuts diamondsD.who sells diamonds
小题3:When the diamond was resold,____________.
A.the dealer lost a lot of money
B.Joker made some more money
C.the dealer got 800, 000 dollars
D.Kaplan got 800,000 dollars
小题4:The owner of the diamond thought that if the diamond was cut successfully it might be worth_________.
A.$ 300, 000B.$ 500,000
C.$ 300, 000D.$ 800,000,000
小题5:Kaplan studied the diamond for____________.
A.more than one and a half years
B.more than half a year
C.over eight months
D.more than nineteen months

题型:不详难度:| 查看答案
Welcome to your future life!
You get up in the morning and look into the mirror. Your face is firm and young-looking. In 2035, medical technology is better than ever. Many people your age could live to be 150, so at 40, you’re not old at all. And your parents just had an anti-aging(抗衰老的) treatment. Now, all three of you look the same age !
You say to your shirt, “Turn red.” It changes from blue to red. In 2035, “smart clothes” contain particles(粒子) much smaller than the cells in your body. The particles can be programmed to change your clothes’ color or pattern.
You walk into the kitchen. You pick up the milk, but a voice says, “You shouldn’t drink that!” Your fridge has read the chip (芯片) that contains information about the milk , and it knows the milk is old . In 2035, every article of food in the grocery store has such a chip.
It’s time to go to work. In 2035, cars drive themselves. Just tell your “smart car” where to go. On the way, you can call a friend using your jacket sleeve(袖子). Such “smart technology” is all around you.
So will all these things come true? “For new technology to succeed,” says scientist Andrew Zolli , “it has to be so much better that it replaces what we have already.” The Internet is one example --what will be the next?
小题1:We can learn from the text that in the future__________.
A.people will never get old
B.everyone will look the same
C.red will be the most popular color
D.clothes will be able to change their pattern
小题2:What can be inferred from Paragraph 4?
A.Milk will be harmful to health.
B.More drinks will be available for sale.
C.Food in the grocery store will carry electronic information.
D.Milk in the grocery store will stay fresh much longer.
小题3:What is the text mainly about?
A.Food and clothing in 2035.
B.Future technology in everyday life.
C.Medical treatments of the future.
D.The reason for the success of new technology.

题型:不详难度:| 查看答案
I spent two months with an American family last year when I studied in America.It is said that “The best house is in the U.S.A., the best wife is in Japan and the best food is in China.”So I took 36    and pleasure to   37    “the best food” for my American family.Each day,regardless of my poor skill of cooking,I performed my play in  38   way:changing the dishes’colour,the meat’s type or the soup’s style.Thus,my American friends could discover the    39   of eating Chinese food. Because of my“      40    ” job,I was often rewarded by their    41  of  appreciation , such as “very  tasty”,“excellent”etc.But the joke was here: yesterday, I cooked Sichuan-style    42  for dinner.I was   43   at my achievement.When all the family members arrived at the table,they first looked     44  at the fish,then looked at me. “Why do all the fish have their    45   ?” they asked,“It’s horrible!” Horrible or beautiful? I don’t know. But I    46  know that fish heads are delicious. The    47   is the best part of fish; in    48    only the respectable guest can have the special     49  of enjoying it. Another                      50     thing is:the American friends often said to me“    51 ”as they  52   fruits or other things. According to Chinese tradition,I would simply smile in answer to their kindness 53 actually helping myself to any of the food.     54  ,I said “help yourself” to them whenever I brought home fruits.Dear me,no matter how much or how often I brought home food, as long as it was nice to their taste,they    55  hesitated to use their hands to “help themselves” until all was finished. 
小题1:
A.worryB.attentionC.delightD.pride
小题2:
A.buyB.fetchC.cook D.leave
小题3:
A.theirB.a newC.the sameD.a simple
小题4:
A.wayB.joyC.troubleD.importance
小题5:
A.hardB.dailyC.goodD.new
小题6:
A.expressionsB.sentenceC.doingD.smile
小题7:
A.meatB.fishC.soupD.egg
小题8:
A.praisedB.pleasedC.badD.surprise
小题9:
A.pleasedlyB.excitedlyC.surprisedly D.worriedly
小题10:
A.bonesB.flesh (人肉)C.tailsD.heads
小题11:
A.doB.willC.want toD.should
小题12:
A.tailB.headC.soupD.flesh
小题13:
A.factB.ChinaC.USAD.the West
小题14:
A.honourB.seatC.tableD.plate
小题15:
A.realB.excitingC.interestingD.easy
小题16:
A.please help us B.excuse meC.help yourselfD.eat them please
小题17:
A.brought homeB.wantedC.were buyingD.were eating
小题18:
A.notB.but notC.withoutD.nor
小题19:
A.At lastB.Above allC.After all D.In return
小题20:
A.usualB.oftenC.neverD.had

题型:不详难度:| 查看答案
Psychologists(心理学家) have known that what"s going on inside our head affects our senses. For example, poorer children think coins are larger than they are, and hungry people think pictures of food are brighter. Professor Remi Radel wanted to investigate(look into) how this happens -- whether it"s right away, as the brain receives signals from the eyes, or a little later, as the brain"s higher-level thinking processes get involved.
Radel chose 42 students and each student was told to arrive at the lab at noon after three or four hours of not eating on the day of the test. Then they were told there was a delay. Some were told to come back in 10 minutes; others were given an hour to get lunch. So half the students were hungry when they did the experiment and the other half had just eaten.
For the experiment, the participant looked at a computer screen. One by one, 80 words flashed on the screen. A quarter of the words were food-related. After each word, the person was asked how bright the word was and asked to choose which of two words they"d seen -- a food-related word like gateau (cake) or a neutral (中性的) word like bateau (boat).
Hungry people saw the food-related words as brighter and were better at identifying food-related words. Because the word appeared too quickly for them to be reliably seen, this means that the difference is in perception (直觉), Radel says—it"s not because of some kind of processing happening in the brain after you"ve already figured out what you"re looking at.
"This is something great to me, that humans can really realize what they need or what they hope for, to know that our brain can really arrange for our motives and needs," Radel says. "There is something inside us that selects information in the world to make life easier.”
小题1:The purpose of Radel"s research is to let us know ____.
A.how our thinking has effect on our senses happens
B.what it is the good time for students to have lunch
C.whether poorer children think coins are larger than they are
D.whether hungry people think pictures of food are brighter
小题2:In the experiment 20 words that flashed on the screen had something to do with “____”.
A.boatB.food C.mind D.weather
小题3:Which of the following is true about the experiment?
A.The students should stare at the words in the book.
B.Each word appeared slowly in order that the participant could read it exactly.
C.After each word flashed on the screen, the person was asked to finish two tasks.
D.On the day of the test, all the students were very hungry because of the delay of their lunch.
小题4:What does the new study find?
A.Actually our brain can arrange for our motives and needs.
B.In the experiment the brain was totally controlled by the senses.
C.People who had just eaten saw all the words more clearly than hungry people.
D.The participants saw the words look different long after the brain dealt with the information.

题型:不详难度:| 查看答案
最新试题
热门考点

超级试练试题库

© 2017-2019 超级试练试题库,All Rights Reserved.