题目列表(包括答案和解析)
Special trees that grow faster, fight pollution, produce better wood, and even sense chemical attacks are being planted by scientists in the US.
When 40 per cent of Hawaii's US$14 million-a-year papaya (木瓜)industry was destroyed by a virus five years ago, work began on creating genetically engineered(转基因的) trees.
Researchers successfully introduced seeds that were designed to resist the virus. Since then, more and more people have been testing genetically engineered trees.
Some researchers put special bacteria into trees to help them grow faster and produce better wood. Others are trying to create trees that can clean polluted soil.
Meanwhile fruit farmers are looking for trees that are strong enough to resist worms, and paper companies want trees that produce more wood and therefore more paper.
The Pentagon (五角大楼) even gave the researchers US$500,000 this year after they developed a pine tree that changes its colours if it senses a chemical attack..
So far, the poplar, eucalyptus (杨树与桉树), apple and coffee trees are among those being engineered. All this can be done today because we have a better understanding of tree genomes(基因组).
However, some people fear that the genetically engineered trees will cause dangerous results. They are worried that the new trees will breed with natural species and change the balance of the forest environment.
"It could be destructive," said Jim Diamond, an environmentalist. "Trees are what is left of our natural environment and home to many endangered species."
But researchers insist that science could give nature a fighting chance against both natural and man-made dangers.
They hope to answer the critics by stopping the new trees from breeding, so their effect on the environment can be controlled.
What trees are NOT the ones that scientists are planting in the US?
A. Trees that worms can't hurt.
B. Trees that can protect themselves at a chemical attack.
C. Trees that can resist wind better.
D. Trees that can improve soil conditions.
What caused the American scientists to work on special trees?
A. They think science could give nature a fighting chance against both natural and man-made dangers.
B. Great numbers of trees have been lost due to attacks by viruses.
C. Researchers successfully introduced seeds designed to resist the virus.
D. Tree genomes are mapped out so scientists know how to improve trees.
Which of the following was probably the first kind of trees being engineered?
A. Papaya. B. Pine. C. Apple. D. Poplar.
The best title of the passage is .
A. The improvement of environment
B. The side-effects of special trees
C. The development of special trees
D. the program of genetically engineered trees
Not all memories are sweet. Some people spend all their lives trying to forget bad experiences. Violence and traffic accidents can leave people with terrible physical and emotional scars. Often they relieve these experiences in nightmare(梦魇).
Now American researchers think they are close to developing a pill, which will help people forget bad memories. The pill is designed to be taken immediately after a frightening experience. They hope it might reduce, or possibly erase(抹去) the effect of painful memories.
In November, experts tested a drug on people in the US and France. The drug stops the body releasing chemicals that fix memories in the brain. So far the research has suggested that only the emotional effects of memories may be reduced, not that the memories are erased.
The research has caused a great deal of argument. Some think it is a bad idea, while others support it.
Supporters say it could lead to pills that prevent or treat soldiers’ troubling memories after war. They say that there are many people who suffer from terrible memories.
“Some memories can ruin people’s lives. They come back to you when you don’t want to have them in a daydream or nightmare. They usually come with very painful emotions,” said Roger Pitman, a professor of Psychiatry(精神病学) at Harvard Medical School. “This could relieve a lot of that suffering.”
But those who are against the research say that changing memories is very dangerous because memories give us our identity(特质). They also help us all avoid the mistakes of the past.
“All of us can think of bad events in our lives that were horrible at the time but make us who we are. I’m not sure we want to wipe those memories out,” said Rebecca Dresser, a medical ethicist(伦理学家).
57. The passage is mainly about_____.
A. a new medical invention
B. a new research on the pill
C. a way of erasing painful memories
D. an argument about the research on the pill
58. The drug tested on people can_____.
A. cause the brain to fix memories
B. stop people remembering bad experiences
C. prevent body producing certain chemicals
D. wipe out the emotional effects of memories
59. We can infer from the passage that_____.
A. people doubt the effects of the pills
B. the pill will stop people’s bad experiences
C. taking the pill will do harm to people’s health
D. the pill has been produced in America
60. Which of the following does Rebecca Dresser agree with?
A. Some memories can ruin people’s lives
B. People want to get rid of bad memories.
C. Experiencing bad events makes us different from others.
D. The pill will reduce people’s sufferings from bad memories.
So far, the moon is the only one of the heavenly bodies in space ______ reached by manned spaceships.
A.that has been |
B.what have been |
C.which has been |
D.that have been |
How to Release Anger the Right Way
Anger is a feeling that many of us know all too well. Some of us experience it daily, 36 others hold on to it for years at a time. As you likely know, angry is not a healthy emotion. Over time it can become self-destructive, 37 relationships and even your health.
This is not to say that anger is always a 38 thing—anger is a natural part of living;it is a 39 that something is wrong. If anger is not a incompletely normal and natural human emotion, it is, however,important to learn and understand how to 40 anger the right way.
You can release anger the right or the wrong way. 41 whether you have an anger problem yourself or not, it is 42 for everyone to understand what the right 43 of releasing anger are. Transforming (转换、变换)anger is a powerful 44 to take that will create positive changes in our relationships. One of the best ways to 45 anger is to give yourself the permission to express anger. In fact, it is quite 46 to express your anger as long as you do it 47 .
Remember that anger management 48 both on mental and physical effort. Although mental treatment alone will help you 49 for releasing your anger, it can only take you so far. The same 50 for exercise too. However, if you combine both mental treatment and exercising, you will then have 51 to an unbelievable positive solution. Do a particular physical activity 52 the mental intention of releasing your anger.
It might be 53 but the most important things of all to 54 is to never hurt others when you release your anger. Make sure you give yourself the 55 to express safely your anger, without hurting anyone else .
A.when B.while C.but D.However
A.reflecting B.ruining C.limiting D.satisfying
A.bad B.good C.ordinary D.especial
A.appearance B.mark C.signal D.gesture
A.release B.relax C.obsorb D.influence
A.Instead of B.Except for C.Regardless of D.As a result of
A.important B.common C.hard D.easy
A.answers B.messages C.ways D.actions
A.step B.right C.attitude D.chance
A.shift B.change C.transfer D.transform
A.painful B.happy C.healthy D.succeeful
A.confidently B.correctly C.gradually D.separately
A.requires B.relies C.lacks D.refuse
A.attentively B.specially C.absolutely D.greatly
A.arranges B.reaches C.prepares D.applies
A.access B.approach C.admission D.contact
A.in charge of B.rather than C.along with D.in place of
A.simple B.obvious C.unrealistic D.proper
A.answer B.remember C.repeat D.listen
A.opportunity B.necessity C.possibility D.reality
第二部分:阅读理解 (共两节,19小题,每题2分, 满分38分)
阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题纸上将该选项标号涂黑。
A
A major earthquake rocked Haiti at 4:53 pm local time on Jan.12, 2010, killing possibly thousands of people but no official figure has been released so far.
The quake, which struck about 15km (10 miles) south-west of the capital, Port-au-Prince, was quickly followed by two strong aftershocks. In the space of a minute, numerous buildings fell down. A five-story U.N. building was also brought down by the 7.3 magnitude quake, the most powerful to hit Haiti in more than 200 years according to the U.S. Geological Survey.
As night fell, the whole city is in total darkness. You can see thousands of people sitting in the streets with nowhere to go. There are people running, crying, screaming. Describing the earthquake as a "catastrophe", Haiti’s president said the cost of the damage could run into billions.
Haiti became the first independent Caribbean state in the early 19th century. Haiti's location, history and attracting climate once made it a tourist hot place. However, decades of poverty, environmental pollution and violence have left it as the poorest nation in the Americans. It has suffered a lot, including four hurricanes and storms in 2008 that killed hundreds.
41. The great earthquake happened to the _______ of the capital city.
A. south-west B. north-west C. south-east D. north-east
42. What can we infer from the underlined sentence?
A. People in Port-au-Prince don’t like to light on.
B. The earthquake happened in the evening.
C. Electricity in the city was cut off that night.
D. There are no lights at all in Port-au-Prince.
43. Which statement about Haiti is NOT true?
A. Haiti became an independent state in the early 19th century.
B. Haiti belongs to Americas, just like Canada, America and so on.
C. At one time, tourism was important to the economy of Haiti.
D. Haiti is a country where such strong quakes often take place.
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