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Even plant can run a fever, especially when they’re under attack by insects or disease. But unlike human, plants can have their temperature taken from 3, 000 feet away straight up. A decade ago, adopting the infrared (红外线)scanning technology developed for military purposes and other satellites, physicist Stephen Paley came up with a quick way to take the temperature of crops to determine which ones are under stress. The goal was to let farmers precisely target pesticide (杀虫剂)spraying rather than rain poison on a whole field, which invariably includes plants that don’t have pest (害虫)problems. Even better, Paley’s Remote Scanning Services Company could detect crop problems before they became visible to the eye. Mounted on a plane flown at 3, 000 feet at night, an infrared scanner measured the heat emitted by crops. The data were transformed into a color-coded map showing where plants were running“fevers”. Farmers could then spot-spray, using 50 to 70 percent less pesticide than they otherwise would. The bad news is that Paley’s company closed down in 1984, after only three years. Farmers resisted the new technology and long - term backers were hard to find. But with the renewed concern about pesticides on produce, and refinements in infrared scanning, Paley hopes to get back into operation. Agriculture experts have no doubt the technology works. “This technique can be used on 75 percent of agricultural land in the United States, ” says George Oerther of Texas A & M. Ray Jackson , who recently retired from the Department of Agriculture, thinks remote infrared crop scanning could be adopted by the end of the decade. But only ff Paley finds the financial backing which he failed to obtain 10 years ago. 1.Plants will emit an increased amount of heat when they are______________. A. sprayed with pesticides B. facing an infrared scanner C. in poor physical condition D. exposed to excessive sun rays 2.In order to apply pesticide spraying precisely, we can use infrared scanning to____________. A. estimate the damage to the crops B. measure the size of the affected area C. draw a color-coded map D. locate the problem area 3.Farmers can save a considerable amount of pesticide by______________. A. resorting to spot-spraying B. consulting infrared scanning experts C. transforming poisoned rain D. detecting crop problems at an early stage 4.The application of infrared scanning technology to agriculture met with some difficulties _______________. A. the lack of official support B. its high cost C. the lack of financial support D. its failure to help increase production 5.Infrared scanning technology may be brought back into operation because of_____________. A. the desire of farmers to improve the quality of their produce B. growing concern about the excessive use of pesticides on crops C. the forceful promotion by the Department of Agriculture D. full support from agricultural experts
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阅读下面短文,按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的词或使用括号中词语的正确形式填空,并将答案填写在答题卡的相应位置上。 Keeping a diary in English is one of the 1.__________ (effect) ways to improve our English writing ability. 2._____________ (compare) with other forms of writing, it is shorter and takes 3.___________ time. It can help us to develop the habit of thinking in English. 4.___________ we persist in this practice, gradually we’ll learn how to express ourselves in English. In keeping a diary in English, we certainly run up against many 5._________. In the first place, 6.___________ often happens that we have trouble finding appropriate words and phrases to give expression to our mind. Secondly, there are many idiomatic ways of saying things in Chinese. And it is extremely hard for us to put them into English properly. As far as I _7._____________ (concern), my 8.____________(suggest) is that we should always have a notebook and a Chinese-English dictionary within easy reach. Whenever something beats us, we can first put it down in our notebook and then consult our dictionary. We can also turn to our English teacher for help, if necessary. In short, I believe that it is 9.__________ great use to keep a diary in English for 10.__ ________ development of our writing skills.
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阅读下面短文,掌握其大意.然后从各题所给的A、B、C和D项中,选出最佳选项,并在答题卡上将该项涂黑。 Carmen’s mother Maria had just survived a serious heart attack. But without a heart transplant(移植)her life was in constant 1. Both the mother and daughter knew that the chances were very small: finding a donor heart that 2Maria’s blood type could take years. However, Carmen was determined to save her mother. She kept 3hospitals all over the country. Days stretched out. By Christmas, Maria had trouble 4from one end of the room to the other. Carmen lost all hope. She fell into a 5of the hospital, crying. “Are you okay?” a man asked. Carmen sobbed as she told the stranger her story. This middle-aged man was named Frank, whose wife, Cheryl, a tender and devoted mother of four lovely children, had been in hospital with a brain disease and wouldn’t 6it through the night. Suddenly, an idea came to Frank’s mind. He knew Cheryl had always wanted to 7something from herself. Could her 8go to Carmen’s mother? After reviewing the data, doctors 9Frank that his wife’s heart was by some miracle a perfect fit for Carmen’s mother. They were able to 10the transplant. That cold night, when Cheryl was 11dead, Frank came to knock at Maria’s door. She was 12for Frank’s family as she had been doing every day recently. Though Maria had never met Frank before, they both felt a strange bond as they hugged and cried. On New Year’s Eve, Carmen attended Cheryl’s 13with Frank’s family, who were singing their favorite song “My heart will go on.” One day later, on New Year’s Day, Maria 14with Cheryl’s heart. Yes, Cheryl’s loving heart would go on, for it was 15in another loving mother’s chest. 1.A. change B. danger C. disorder D. pain 2.A. matched B. replaced C. controlled D. cooperated 3.A. finding B. phoning C. touring D. interrupting 4.A. rolling B. running C. walking D. jumping 5.A. corner B. bed C. man D. nurse 6.A. put B. support C. pass D. make 7.A. save B. recycle C. donate D. separate 8.A. heart B. brain C. husband D. spirit 9.A. informed B. warned C. congratulated D. reminded 10.A. give up B. carry out C. search after D. put off 11.A. noticed B. predicted C. found D. declared 12.A. praying B. begging C. decorating D. singing 13.A. funeral B. operation C. performance D. anniversary 14.A. passed away B. woke up C. left behind D. dressed up 15.A. active B. alive C. necessary D. changeable
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根据图画中的内容,以It’s harmful to Civilization为题写一篇词数为100词左右的短文。文章包括以下三个部分: 1)简述图画内容; 2)说明图画所反映的主题; 3)写出自己的看法。关键词:cheat, quarrel, spit, litter, jump the queue
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以下标有题号的每一行均有一个错误,请找出,并按下列情况改正:此行多一个词;把多余的词用斜线(\)划掉,在该行右边横线上写出该词,并也用斜线划掉。此行缺一个词:在缺词处加一个漏字符号(Λ),在该行右边横线上写出该加的词。此行错一词:在错的词下划一横线,在该行右边横线上写出改正后的词。 Unlike many other places, our hometown is also facing 1.____ the problem of pollution.Unfortunately, people here have 2.____ realized the importance of protection the natural environment. 3.____ Factories have been taken measures to stop pouring polluted 4.____ water into the rivers.The citizens not longer put waste, such 5.____ as rubbish or human waste into the rivers.Every year, 6.____ a great number trees are planted.As a result, 7.____ the water in the rivers are becoming cleaner and cleaner. 8.____ The hills around the city were covered with green trees 9.____ and the air here is much more fresher than before. 10.____
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Do you find getting up in the morning so difficult that it's painful? This might be called laziness, but Dr.Kleitman has a new explanation.He has proved that everyone has a daily energy cycle. During the hours when you labor through your work you may say that you're “hot”.That's true.The time of day when you feel most energetic is when your cycle of body temperature is at its peak(高峰).For some people the peak comes before noon.For others it comes in the afternoon or evening.No one has discovered why this is so, but it leads to such familiar monologues ( 自言自语 ) as: “Get up, John! You'll be late for work again!” The possible explanation to the trouble is that John is at his temperature-and- energy peak in the evening.Much family quarrelling ends when husbands and wives realize what these energy cycles mean, and which cycle each member of the family has. You can't change your energy cycle, but you can learn to make your life fit it better.Habit can help, Dr.Kleitman believes.Maybe you're sleepy in the evening but feel you must stay up late anyway.Counteract ( 对抗 ) your cycle to some extent by habitually staying up later than you want to.If your energy is low in the morning but you have an important job to do early in the day, rise before your usual hour.This won't change your cycle, but you'll get up steam ( 鼓起干劲 ) and work better at your low point. Get off to a slow start which saves your energy.Get up with a leisurely yawn and stretch.Sit on the edge of the bed a minute before putting your feet on the floor.Avoid the troublesome search for clean clothes by laying them out the night before.Whenever possible, do routine work in the afternoon and save tasks requiring more energy or concentration for your sharper hours. 1.If a person finds getting up early a problem, most probably________. A.he is a lazy person B.he refuses to follow his own energy cycle C.he is not sure when his energy is low D.he is at his peak in the afternoon or evening 2.Which of the following may lead to family quarrels according to the passage? A.Unawareness of energy cycles. B.Familiar monologues. C.A change in a family member's energy cycle. D.Attempts to control the energy cycle of other family members. 3.If one wants to work more efficiently at his low point in the morning, he should________. A.change his energy cycle B.overcome his laziness C.get up earlier than usual D.go to bed earlier 4.Which of the following statements is NOT true? A.Getting off to work with a minimum effort helps save one's energy. B.Dr.Kleitman explains why people reach their peaks at different hours of day. C.Habits help a person adapt to his own energy cycle. D.Children have energy cycles, too.
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With a busy life and job, pressure can make you look tired and aged.Kissi Health-Beauty Center gives classes, makes training plans according to your physical conditions, and sets up an individual file.All these things will help you to get to know your body and the way to keep it fit. 1) BODY-BUILDING Imported gym equipment will help you build up your body’s muscles, making you look full of energy and strength. 2) GYMNASTIC EXERCISES A bright and large exercise room with excellent equipment and music will give your body a chance to enjoy movement with rhythm. 3) SPECIAL “LAZY-BONE” FITNESS CENTER “Lazy-bone” fitness equipment is the first bodyshaping set of seven beds in Houston.Designed according to human anatomic (解剖学的) and kinematic(运动学的)theory, the seven special beds will help you to exercise your waist, abdomen(腹), hips(臀)or legs.In the relaxing hours you may try them to strengthen your muscles and lose weight. *Tuition: “Lazy-bone” fitness card, 1000 dollars /month (gymnastic classes included). *Open Time: 10:30 a.m.—10:30 p.m.every Monday, Wednesday, Friday, Saturday and Sunday *Tel: 59185700 *Address: 16 Johnson Street, Houston 1.The purpose of this passage is to ______. A.give advice on health B.introduce new ways of body-building C.ask you to go to the center D.introduce ways to lose weight 2.If you want some exercise as well as relaxation after a busy day, you’ll go to the center and ______. A.learn anatomic and kinematic theory B.lie still on the special beds C.join in the gymnastic exercises D.buy a special card 3.Tom Everest who keeps a “Lazy-bone” fitness card can go to the center ______ this week. A.11:30 a.m.Monday B.11:30 p.m.Monday C.10:00 a.m.Tuesday D.10:00 p.m.Tuesday 4.According to the passage, the center wants to show it is _____ . A.the most convenient B.the largest C.the newest D.the most advanced
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More than one million children in the United States do not go to school.Instead, they learn at home.Most often, their parents are their teachers.Educational companies, libraries and the Internet provide many families with teaching materials. Parents choose home schooling for several reasons.Some choose it because of their religious beliefs.Others say it provides more time for the family to be together.They say the home offers a better place for learning.Some parents believe home schooling avoids learning.Some parents believe home schooling avoids problems of national schools.Critics, however, say children need to attend school with other children. All fifty American states and the District of Columbia permit home schooling.Some states do not require much preparation by parents or testing of children.Other states have more requirements for home schooling.Home schooling in the United States began when the country was established.In farm areas, people often lived far from a school.Widespread home schooling took place until about the middle of the nineteenth century.Then, in 1852, the state of Massachusetts passed the first law requiring children to attend school. Over the years, the American public education system strengthened and grew.By the 1960s and 1970s, however, some Americans believed that traditional education was not helping their children.So a number of parents began home schooling. Home schooling expert Linda Dobson says many people have helped the movement grow.She says many kinds of people have joined the movement.These include rich people and poor people.They represent many races, religions and political beliefs.Ms.Dobson says the number of home-schooled children has increased an estimated fifteen to twenty percent each year during the last fifteen years. 1.Teaching materials for home schooling do NOT come from _______. A.parents B.libraries C.the Internet D.educational companies 2.Which of the following is one of the reasons why parents choose home schooling? A.it makes parents and their children have less time together. B.Some people have different religious beliefs from the others. C.It can’t provide a comfortable place for children to be in. D.There are too many students in a home classroom. 3.Home schooling was started in ________. A.the 1960s B.the 1970s C.the 1850s D.the 1776 4.Home schooling in the United States now is __________. A.facing many difficulties B.struggling C.growing fast D.decreasing in large numbers
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About 90 percent of Chinese believe the polarization(分化) between the rich and poor is “serious” in China, according to a survey conducted by China Youth Daily.And more than 80 percent of the respondents(对象) surveyed said something must be done to narrow the expanding gap between the rich and poor, while 14.1 percent said it was necessary. The polarization has aroused wide concern among the public in recent years.The State Development and Reform Commission(国家发改委) said the Gini Coefficient had reached 0.47 for China, up from o.29 two decades ago.Usually, a country with a number above 0.4 is warned to pay attention to the income inequality problem. To find out the people’s view, the survey covered 10,250 respondents, between the ages of 20 and 30 with a college education and a monthly salary between 1,000 and 3,000 yuan.Surprisingly, most disagreed with the view of experts who claim the urban-rural difference is causing the widening gap.More than 70 percent of the respondents believed that “ the group of special interests” is the prime reason for the polarization, followed by “people in power” 68 percent, and “bosses” 50 percent. Another unexpected finding is that almost all agreed that a good educational background and knowledge were not the decisive factors in gaining wealth.About 95 percent said rich people are not necessarily those who are able to speak English or have a college education. Today in China, rich people , accounting for 10 percent of the population, control 45 percent of the total social fortune, and poor people, also 10 percent of the population, only control 1.5 percent, according to an investigation published by the National Bureau of Statistics last June. 1.It can be inferred that the Gini Coefficient ( in paragraph 2) would probably be _____. A.the unit used in advanced mathematics B.the degree of a country’s development C.the level of the citizen’s living standard D.a measure of income inequality 2.Experts hold the view that the main reason for the polarization is _____. A.the urban-rural difference B.the group of special interests C.the people in power D.the bosses 3.
4.What’s the best title of the passage? A.Close the Gap between the Rich and Poor B.Surveys conducted by China Youth Daily C.Higher education, Higher pay D.Rich-Poor Divide Serious, Study Finds
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In ancient times the most important examinations were spoken, not written.In the schools of ancient Greece and Rome, testing usually was made up of saying poetry aloud and giving speeches. In the European universities of the Middle Ages, students who were working for advanced degrees had to discuss questions in their field of study with people who had made a special study of the subject.This custom exists today as part of the process of testing candidates(应试者) for the doctor’s degree. Generally, however, modern examinations are written.The written examination, where all students are tested on the same questions, was probably not known until the nineteenth century.Perhaps it came into existence with the great increase in population and the development of modern industry.A room full of candidates for a state examination timed exactly by electric clocks and carefully watched over by managers, looks like a group of workers at an automobile factory.Certainly, during examinations teachers and students are expected to act like machines. One type of test is sometimes called an “objective” test.It is intended to deal with facts, not personal opinions.To make up an objective test, the teacher writes a series of questions, each of which has only one correct answer.Along with each question the teacher writes the correct answer and also three statements that look like answers to students who have not learned the material properly. 1.The main idea of Paragraph Three is that ___________ . A.workers now take examinations B.the population has grown C.there are only written exams today D.examinations are now written and timed 2.The kind of exams where students must select answers are ___________ . A.objective B.personal C.spoken D.written 3.Modern industry must have developed ____________ . A.around the 19th century B .before the Middle Ages C.in Greece or Rome D.machines to take tests 4.It may be concluded that testing __________ . A.should test only opinions B.should always be written C.is given only in factories D.has changed since the Middle Ages
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