精英家教网 > 高中英语 > 题目详情
A  rainfores(雨林)is an area covered by tall trees with the total high rainfall spreading quite equally through the year and the temperature rarely dipping below 16℃.Rainforests have a great effect on the world environment because they can take in(吸收) heat from the sun and adjust (调节)the climate. Without the forest cover, these areas would reflect more heat into the atmosphere,warming the rest of the world .Losing the rainforests may also influence wind and rainfall patterns, potentially causing certain natural disasters(灾害) all over the world.
In the past hundred years, humans have begun destroying rainforests in search of three major resources (资源): land for crops, wood for paper and other products, land for raising farm animals. This action affects the environment as a whole. For example,a lot of carbon dioxide(二氧化碳)in the air comes from burning the rainforests. People obviously have a need for the resources we gain from cutting trees but we will suffer much more than we will benefit(受益).
There are two main reasons for this. Firstly, when people cut down trees, generally they can only use the land for a year or two. Secondly, cutting large sections of rainforests may provide a good supply of wood right now, but in the long run (长远看)it actually reduces the world’ s wood supply.
Rainforests are often called the world’s drug store. More than 25% of the medicines we use today come from plants in rainforests. However, fewer than 1% of rainforest plants have been examined for their medical value. It is extremely likely that our best chance to cure diseases lies somewhere in (在于)the world’s shrinking rainforests.
小题1:..Rainforests can help to adjust the climate because they________.
A.reflect(反射) more heat into the atmosphere
B.bring about high rainfall throughout the world
C.rarely cause the temperature to drop lower than 16℃
D.reduce the effect of heat from the sun on the earth
小题2:..What does the word “this” underlined in the third paragraph refer to?
A.We will lose much more than we can gain.
B.Humans have begun destroying rainforests.
C.People have a strong desire for resources.
D.Much carbon dioxide comes from burning rainforests.
小题3:.What might be the best title for the text?
A.How to Save RainforestsB.How to Protect Nature
C.Rainforests and the EnvironmentD.Rainforests and Medical Development

小题1:. D
小题1:. A
小题1:.C
练习册系列答案
相关习题

科目:高中英语 来源:不详 题型:阅读理解

Blind imitation (模仿)is self-destruction.To those who do not recognize their unique worth. Imitation appears attractive: to those who know their strenghth. Imitation is unacceptable.
In the early stages of skill or character development, imitation is helpful. When I first learned to cook, I used recipes (菜谱) and turned out some tasty dishes. But soon I grew bored. Why follow someone else’s way of cooking when I could create my own? Imitating role models is like using training wheels on a child’s bicycle; they help you get going, but once you find your own balance, you fly faster and farther without relying on them.
In daily life, imitation can hurt us if we subconsciously (下意识地) hold poor role models. If, as a child, you observed people whose lives were bad, you may have accepted their fear and pain as normal and gone on to follow what they did. If you do not make strong choices for yourself, you will get the results of the weak choices of others.
In the field of entertainment, our culture glorifies celebrities. Those stars look great on screen. But when they step off screen, their personal lives may be disastrous. If you are going to follow someone, focus on their talent, not their bad character or unacceptable behaviors.
Blessed is the person willing to act on their sundden desire to create somrthing unique.Think of the movies,books,teachers,and friends that have affected you most deeply.They touched you because their creations were motivated by inspiration,not desperation.The world is changed not by those who do what has been done brfore them,but by those who do what has been done inside them.Creative people have an endless resource of ideas.The problem a creator faces  is  not running out of material;it is what to do with the material knocking at the door of imagination.
Syudy your role models,accept the gifts they have given,and leave behind what does not server.Then you can say,”I stand on the shoulders of my ancestors”tragedies and  tory ,and know that they are cheering on.
小题1:Imitation proves useful when you        .
A.know you are unique
B.lose the bslance of life
C.begin to learn something new
D.get tired of routine practice
小题2:To avoid the bad result of imitation, we should________.
A.forget daily fear and pain
B.choose the right example
C.ask others for decisions
D.stay away from stars
小题3:Acording to the author. The world moves on because of those who are          .
A.desperate to intruence others with their knowledge
B.ready to turn their original ideas into reality
C.eager to discover what their ancestors did
D.willing to accept others’ideas
小题4:The trouble a creator faces is          .
A.the lack of strong motivation
B.the absence of practical ideas
C.how to search for more materials
D.how to use imagination creatively
小题5:What is the author’s purpose in writing this passage?
A.To highlight the importance of creatively.
B.To criticize the characters of role models.
C.To compare imitation with creation.
D.To explain the meaning of success.

查看答案和解析>>

科目:高中英语 来源:不详 题型:阅读理解

Ants have a reputation for strength,organization and teamwork.But researchers have now discovered that a key secret to the success of ants is their ability to identify the importance of age in the work place.
A study of Gentral American leaf-cutter ants has shown that the younger and stronger members are give the toughest job of cutting therough the leaves they harvest.Their sharp youn teeth do this job effectively,but as they get older their teeth become relatively worn and blunt.
But rather than being retired or abandoned by the group,the ageing ants are given a new role more suyted to their physical abilities.They become carriers and teansport the leaves back to the kingdom where they are harvested for food.
The findings by researchers from the University of Oregon and the Oregong State University support previous research showin the survival of a leaf-cutter kingdom depends on the efficiency(效率)of is workers.
“Cuting leaves is hard work,”said Dr.Robert Schofield,who led the research team.“Much of the cutting is done with a V-shaped blade(刀片)between teeth on their jaws.This blade starts out as sharp as the sharpest razor blade that humans have developed.”But over rime the teeth become blunter and the cutting job slows down.The team estimated that,because of this age-related wear,a colony(蚁群)spent twice the energy cutting leaves than it would if all the ants had sharp blades.Its findings support the idea that wear and break can be significant problems for insects as well as largre animals.
Like humans,leaf-cuttre ant recognize that older members of the group can still make a worhwhile contribution to society.“This study shows an advantage of social living that we are familiar with,”said Dr.Schofield.
小题1:The younger and stronger ants do the toughest job because      .
A.they can teansport the leaves effectively
B.they have a sharp blade to cut leaves
C.other members are busy with other work
D.they can finish the job in a better organized way
小题2:The undrelined word“blunt”in the second paragraph can be replaced by      .
A.quite looseB.less sharp
C.quite fragileD.more dirty
小题3:What happens to the ants when they become old?
A.They no longer hve work to do.
B.They keep doing the same work.
C.They have to leave and live on themselves.
D.They are given a new worthwhile job.
小题4:It can be learned from the passage that       .
A.Dr.Schofield is the first to research leaf-cuttre ants
B.older ants are more powerful in carrying leaves
C.large animals can also suffer from some kind of wear
D.leaf-cutter ants are the most lever ants in the world
小题5:What can be the best title for the passage?
A.The key secret to the success of ants
B.The developed structure of ant colony
C.The most challenging job for leaf-cutter ants
D.No V-shaped blade,no success of ants

查看答案和解析>>

科目:高中英语 来源:不详 题型:阅读理解

Dear editor,
I am Paul , a senior English teacher in Linchuan No. 1 Middle School in Jiangxi Province , China. This letter is written to ask for your opinion.
The other day, I met with a multiple - choice exercise. We teachers argued heatedly with each other over its answer. Unfortunately, neither side could convince the other. The sentence is to be attached at the end of the letter. There is no doubt that the reference answer C is correct. But I don’t  think it is the only answer. Personally, I do think A is also a reasonable choice in sense as well as in grammar, if the case is treated from another aspect.                                
What puzzles me is why we should deal with so many multiple - choice exercises with not rigorous(严谨的)enough reference keys. But being a teacher, it’s very important and necessary to make it clear to students which answer is correct, which is more appropriate, and which is the best one. Regrettably, Multiple - choice test, which is a bit old - fashioned in western countries, seems to be quite popular and covers a rather high percentage in all sorts of English tests in China, especially in NMET.
Personally speaking, I don’t think multiple - choice test form making up more than 75 percent of the total scores in college entrance examination is a very good and effective testing method. Instead, more subjective testing forms depending on one’s own thinking and his ability to use the language like key words falling, question answering, paragraph or passage summarizing, English - Chinese or Chinese - English inter - translation, etc. should be applied to English proficiency tests. Through the test forms mentioned above, students’ ability to use the language will be better developed. Consequently, more advanced and outstanding English learners could be picked out. In fact, a test paper focusing on multiple - choice test influences, in a sense, students to form their own language thinking, which hinders(阻碍)the development of their language ability as well. Do you think so?
I am looking forward to your authoritative opinion. Thanks.
Yours sincerely,
Paul Liao
小题1:.
. What can be learnt from the letter is that the writer ________.
A.writes to argue with the editor over China’s present test system
B.thinks the reference answer to the sentence is completely wrong
C.thinks subjective test forms constitute a rather high percentage in NMET
D.doesn’t think highly of China’s present English proficiency test forms
小题2:.
. In order to better develop students’ ability to use English, the writer suggests ________.
A.dealing with more multiple - choice exercises
B.laying stress on the practice of subjective exercises
C.arguing hotly with teachers over reference answers
D.considering a problem from different aspects
小题3:.
Which of the following does NOT belong to subjective exercises in English learning?
A.Keeping a diary.B.Summarizing a paragraph.
C.Copying a test.D.Translating a passage.
小题4:.
The writer seems to feel ________ as to the future development of students’ language ability.
A.concernedB.curiousC.confusedD.satisfied

查看答案和解析>>

科目:高中英语 来源:不详 题型:阅读理解

Bexley Middle School eighth-graders won the grand prize at the 2009 National Engineers Week Future City Competition (TM) on Feb. 18 in Washington, D.C. They competed with 37 other schools across the country.
The students qualified for the national competition by winning a regional competition on Jan. 17 in Columbus. By winning the national event, the students earned an all-expenses paid trip to Space Camp in Huntsville, Ala., according to a Bexley school district news report.
Future City aims to stir (激发) interest in science, technology, engineering and math among young people. Bexley team members were Tom Krajnak, Abby Sharp, Wyatt Peery, Elizabeth Maher, Aaron Hutchinson and Truman Haycock. They work in teams under the guidance of a teacher, Margaret Englehardt, and a volunteer engineer, Mark Sherman, design and build a city of tomorrow. Mayor John Brennan presented the students during a recent Bexley City Council meeting. Each team in the Future City competition plans its city using Sim City software and creates a model to show a physical representation of one section of the city. Team members must write both an essay about the yearly theme and an abstract about their city. They also must make a presentation to judges.
Focusing on eco-responsibility, the Bexley team built “Novo-Mondum,” an Icelandic city in the year 2171. Krajnak said the team’s project included a new water system for each resident unit and a 500-word essay on using bacteria to purify water. “We used our essay and abstract (摘要) to build a model,” he said. “It was hard to organize which building would go where, what each building does and how to make it look good.”
Englehardt said her students did a good job answering impromptu (即席) questions during the regional competition. “They can think on their feet,” she said. Principal Harley Williams said the school is very proud of the students’ performance.
小题1:.. From the passage we can learn that the grand prize winners will _________.
A.receive scholarship for further studies
B.get a free trip to Space Camp in Huntsville
C.earn a large sum of money for their designs
D.be admitted to universities without exams
小题2:.The goal of the Future City competition is to _________.
A.make the Sim City software popular
B.test the students’ knowledge of city planning
C.select future engineers from young students
D.make students become interested in engineering
小题3:. Each team must do the following EXCEPT _________.
A.write brief abstracts describing their city
B.present and defend their designs before judges
C.build a future city in Iceland by themselves
D.create model cities using the Sim City software
小题4:. According to Margaret Englehardt, the students _________.
A.always stand still in the competition
B.react very quickly to the questions
C.prepare for the questions in advance
D.take pride in the advisers’ performance
小题5:

查看答案和解析>>

科目:高中英语 来源:不详 题型:阅读理解

Scientists have found what look like caves on Mars, and say they could be protecting life from the planet’s terrible environment.
The first caves appear as seven mysterious black dots (点) on the pictures which were sent back by NASA’s Mars Odyssey orbiter. Each as large as a football field, they may be openings into natural caves below the Martian surface.
“If there is life on Mars, there is a good chance that you’d find it in caves,” said Jut Wynne, one of the researchers who noticed the features (特征) while working on a US Geological Survey Mars Cave Detection Program.
Jonathan Clarke, a geologist with the Mars Society of Australia, yesterday described the discovery as exciting.
One photo taken at night by an infrared imager(红外线成像器) showed one hole to be unusually warm, suggesting hot air may be flowing out.
“I said: ‘Wow, that’s a cave’” Dr. Clarke said excitedly. “People have been looking for these for a long time; now we have found them.”
He agreed such caves could be perfect places to search for life escaping from the bitterly cold, radiation-soaked(充满辐射的), dry surface.
“Tiny drops of water could collect inside,” he said. “If there are gases coming out, they could provide energy for a whole range of bacteria (细菌). A cave is also a protection from radiation; the surface of Mars is exposed to high levels of space radiation.”
The caves probably formed when tube-shaped lava flows(管状岩浆流) spread across the planet long ago. The outside of the tubes cooled, forming solid walls, while something hotter inside allowed the remaining to flow out, forming caves.
小题1: What does the passage mainly talk about?
A.How the caves were formed on Mars.
B.How NASA sent the pictures back to earth
C.Caves on Mars may be full of hot air or a sign(迹象)of life.
D.Scientists have completely recognized the surface of Mars.
小题2: We can learn from the passage that __________.
A.water has already been found on Mars
B.the scientists found all the caves at night
C.it is certain that there is life in these caves
D.the surface of Mars is bitterly cold, radiation-soaked and dry
小题3: According to the passage, Dr. Clarke was so excited because ________.
A.such caves could provide energy for life
B.they had finally found the caves on Mars
C.such caves would be perfect places to search for life
D.There would be life on Mars.
小题4: Necessary conditions for life on Mars mentioned in the passage may include_________.
A.lava and energyB.water and radiation from space
C.gases and lavaD.water and protection from radiation
小题5: what does the underlined word “ the planet” in paragraph 1 refer to?
A.the MarsB.the earthC.the cavesD.radiation

查看答案和解析>>

科目:高中英语 来源:不详 题型:阅读理解

“There is an out – of – date idea that children grow up and leave home when they’re 18,and the truth is far from that,” says Mr.Larry Bumpass of the University of Wisconsin.Today unexpected numbers of young adults are living with their parents.“There is a great change in the middle class,” declares Allan Schnaiberg of Northwestern University, whose son, 19, moved back in after an absence of eight months.
Scientists show a number of reasons for this return to the nest.The marriage age is rising, a condition that makes home and its pleasantness particularly attractive to young people.A high divorce (离婚) rate and a low remarriage rate make some differences.For some, the expense of an away - from - home college education has become so great that many students now attend local schools.Even after graduation, young people find their wings tied by terrible housing costs.
Living at home, says Knighton, a school teacher, continues to give security (安全保卫) and moral(道义的) support.Her mother agreed.“Its strange for the kids to pay all that money for rent.It makes sense for kids to stay at home.” But sharing the family home requires changes for all.There are the hassles over bathrooms, telephones and privacy.Some families, however, manage the careful balancing act.But for others, it proves too difficult.Michelle Del Turco, 24, has been home three times and left three times.“What I considered a social drink, my dad considered an alcohol (酒精) problem,” she explains.“He never liked anyone I dated, so I either had to hide away or meet them at friends' houses.”
Just how long should adult children live with their parents before moving on? Most scientists feel lengthy homecomings are a mistake.Children, can end up with a sense of defeat and failure.And aging parents, who should be enjoying some freedom, find themselves stuck with too many things.Many agree that brief visits, however, can work well.
小题1:According to the author, there was once a trend in the U.S.________.
A.for young adults to leave their parents and live separately
B.for middle class young adults to stay with their parents
C.for married young adults to move back home after a lengthy absence
D.for young adults to get jobs nearby in order to live with their parents
小题2:Which of the following does not lead to young adults returning to the nest?
A.Young adults find housing costs too high.
B.Young adults are not old enough.
C.Young adults look for parental comfort and support.
D.Quite a number of young adults attend local schools.
小题3:The underlined word “hassles” in the passage probably means _________.
A.agreements B.worries
C.disadvantages D.quarrels
小题4:According to the passage what is the best for both parents and children?
A.They should share the family expenses.
B.Children should leave their parents when they are grown up.
C.Adult children should live away from their parents and visit their parents from time to time.
D.Parents should support their adult children when they are in trouble.
小题5:.One of the disadvantages of young adults returning to slay with their parents is that ______.
A.there will certainly be inconveniences in even-day life
B.most parents find it difficult to keep a bigger family going
C.the young adults try to be overprotected by their parents
D.public opinion is against young adults staying with their parents

查看答案和解析>>

科目:高中英语 来源:不详 题型:阅读理解

ERATH WEEK---A DIARY OF THE PLANET
Enduring Storms
Several more rounds of severe storms, tornadoes and flash flooding struck many parts of the American Midwest and Northeast as bad weather continued across the US for a second month.   

Monsoon Storms
A south-west monsoon has caused havoc in parts of Sri Lanka. Government meteorologists said that unexpected monsoonal winds blew directly across the country from the Southern Hemisphere at about 100km/h, producing several rounds of stormy weather. Nearly 250 houses in the capital Colombo were damaged.
Mt. Etna Erupts
Sicily’s Mount Etna volcano erupted shortly after midnight on July 1, shooting “bombs” of lava nearly 1.5 meters in diameter on the eastern side of the mountain. The 30-minute eruption could be seen for several miles, but did not threaten any nearby villages.
Hurricane
Hurricane Blas lost strength as it moved over cooler waters in the Pacific Ocean to the west of Mexico. Blas formed off southwest Mexico during the previous week, but squalls on the outer fringes of the storm lashed western Michoacan State, killing four people when their wood and cardboard home collapsed.
Monkey Repellent
After years of unsuccessful attempts to keep crop-eating monkeys out of Japanese fields, a Tokyo research team believes that it may have finally found a way to prevent the damage caused by the monkeys. Animal raids on crops were successfully prevented by shooting chilli powder into the air, irritating the eyes and noses of monkeys that passed in front of carefully-placed warning sensors. “We’ve tried al kinds of preventive measures, but the monkeys are smart enough to outwit the tricks, “said Toshiaki Wada, Director of the Tokyo Forestry Experiment Station in western Tokyo.
小题1:.
. According to the information, which of the following statements is TURE?
A. The eruption of Mt. Etna lasted thirty days.
B. Hurricane Blas was formed off the coast of Italy.
C. The American Midwest had fine weather throughout July 1998.
The eruption of Mt. Etna did not destroy local villages.
小题2:.
. According to the information, the monkeys in the Japanese fields ________.
A.destroy cropsB.kill unsuspecting humans
C.spread eye diseases to humansD.stop farmers from working
小题3:.
. The information in the “Earth Week” diary _______.
A.predicts future weather patterns
B.gives advice on dealing with monsoons
C.shows that weather can be unpredictable
D.shows the effects that storms have on animals

查看答案和解析>>

科目:高中英语 来源:不详 题型:阅读理解

Researches show what we already suspected: Three out of four babies who died of SIDS(婴儿猝死) involved co-sleeping. We’ll say it again. The safest course is not to sleep with babies.
We know the argument: Bad parenting, not co-sleeping, is to blame for the dozens of babies’ deaths. Some parents stick to co-sleeping because it helps them bond with their newborns. They say those who give co-sleeping a bad name either had been drinking, used drugs or were too tired to notice that they rolled over on their children.
But, most of the cases did not involve drugs or alcohol. There’s a “but” here, however. Submitting to a test for drugs or alcohol in these cases is voluntary, so it’s difficult to know with certainty.
Organizations like the Black Health Coalition and others have explained the safe way to co-sleep. While we understand those arguments, we also know that mistakes can happen and that it only takes one time for something to go terribly wrong. The risk outweighs the benefit.
In all likelihood, parents will continue to co-sleep, and some will do so without ever having an incident, but babies are too vulnerable(易受伤的) for parents to take such chances. Therefore, the best place for babies to sleep is in their own beds, on their backs, with no pillows, blankets or toys. No parent wants a tragedy(悲剧) to occur. The best way to make sure the tragedy doesn’t happen is to allow babies to sleep alone in their own cribs(摇篮).                                         
小题1:According to the author, most of the SIDS cases happened because of ________.
A.drugs
B.co-sleeping
C.drinking
D.bad parenting
小题2:Some parents think sleeping with their babies can ________.
A.keep the babies healthy
B.give co-sleeping a good name
C.prevent themselves from drinking
D.develop a good relation with their babies
小题3:The author holds the opinion that ________.
A.parents can sleep with babies, but cautiously
B.co-sleep helps to bring babies closer to parents
C.parents can’t take chances to sleep with their babies
D.accidents only happen to those careless parents
小题4:Which of the following best describes the structure of the text?
A.①B.①②C.①D.①
↙↘                                   ↓                  ↙↓↘              ↙↓↓↘
②③④                  ③④                 ②③④           ②③④⑤
↘↙                                  ↓                  ↘↓↙
⑤                            ⑤                  ⑤

查看答案和解析>>

同步练习册答案