A．The great impact and progress in genetic en...

1.__________

Current research into the human gene system is helping us understand why people have predispositions（易患某病倾向）to certain diseases．Knowing our genetic makeup can help us to judge whether or not we may be stricken by particular illness, such as cancer．Even before birth, we are able to do genetic screenings to determine what a child's genetic disorder will be．Scientists have already isolated and identified the genes responsible for the more than 4,000 genetic diseases that affect human beings．

2.__________

The implications of this knowledge are astonishing. In addition to predicting genetic predisposition towards diseases, gene therapies may provide new treatments or cures for serious diseases．Millions of people already use genetically engineered drugs to treat heart disease, cancer, AIDS, and strokes （中风）. But with the research that is now being conducted, we may find cures to many more diseases．In the near future, genetic experimentation will also allow parents to select the traits of their children. Genetic traits that determine height, weight, eye and hair color will be able to be controlled, and many parents are excited about this potential.

3.__________

Many people, however, are unwilling to accept the possibilities genetic research allowsFor example, one reason some women do not use the largest genetic testing for breast cancer is because they are afraid they will be discriminated against．Another problem is that many people do not want to discover their weakness．What if they learn that they have a disease for which there are no medical cures? How will such knowledge affect their lives? Do people really want to know what they will die of?

4.__________

Many people believe that history has not always shown human decision-making to be bright when it comes to ethical（道德的）choices. Jeremy Rifkin is probably the most well known opponent of genetic engineering. He believes that humans are not responsible enough to experiment with genes and should not “play God” He asks, “Just because it can be done, does that mean it should be done?” He points out that our society will eventually look and act the same if parents select the traits of their children, and he questions the desirability of such a society．

5.．__________

One of the fears expressed about genetic experimentation involves privacy. Already blood sample taken from patients in hospitals have been used for genetic research without the patients’ permission. Most people would agree that one’s health and genetic makeup are private concerns. But if insurance companies gain access to this information, it could have a large impact on insurance coverage or costs; if employers gain access to the information, it could have a large impact on hiring or promotion decisions. The possibilities for discrimination are obvious．

高二英语信息匹配简单题查看答案及解析

_______all kinds of difficulties，the workers have made rapid progress in the construction of the World Expo 2010 Shanghai．

A．With                   B．For                     C．Under                    D．Beyond

高二英语单项填空简单题查看答案及解析

A purple tomato genetically engineered to contain nutrients more commonly seen in dark berries helped cancer in mice, British researchers said on Sunday. The finding, published in the journal Nature Biotechnology, bolsters the idea that plants can be genetically modified(changed) to make people healthier.

Cancer-prone mice fed the modified fruit lived significantly longer than animals fed a standard diet with and without regular tomatoes, Cathie Martin and colleagues at

the government-funded John Innes Center in Britain reported. “The effect was much bigger than we had expected.” said Martin, a plant biologist.

The study focused on anthocyanins，a type of antioxidant found in berries such as blackberries and blackcurrants that have been shown to lower risk of cancer, heart diseases and some neurological diseases. While an easy way to improve health, many people don’t eat enough of these fruits, the researchers said. Using genes from the snapdragon flower, the researchers discovered they could get the tomatoes to make anthocyanins---- turning the tomato purple in the process.

Mice genetically engineered to develop cancer lived an average of 182 days when they were fed the purple tomatoes, compared to 142 days for animals on the standard diet. “It is greatly encouraging to believe that by changing diet, or specific components in the diet. You can improve health in animals and possibly humans.” Martin said in a telephone interview.

The researchers warned that trials in humans are a long way off and the next step is to investigate( look into) how the antioxidants actually affect the tumors to promote better health. But the findings do support the formal research suggesting that people can significantly improve their health by making simple changes to the daily diet, other researchers said.

“It’s exciting to see new techniques that could potentially make healthy foods even better for us.” said Doctor Lara Bennett, science information office at Cancer Research UK. “ But it is too early to say whether anthocyanins obtained through diet could help to reduce the risk of cancer.”

1.The text mainly tells us _________.

2.In the first paragraph the underlined word “ bolster” probably means _______

3.Which of the following was NOT the result found in the study?

4.According to Dr. Lara Bennett, the effects of anthocyanins through diet on human being________

高二英语阅读理解中等难度题查看答案及解析

Nowadays science has made great progress in every aspect and more and more really good inventions have changed our daily lives. However, the U.S. Patent Office has issued over 7.5 million patents (专利), and not all of them are quite so celebrated. Some good, some bad, and some crazy! The following lists some of the most unusual ideas that have come along.

Snake Leash (皮带)

In 2002, a patent was issued for a snake-walking leash. There are at least two major problems with this idea. 1) Dog leashes fit securely between the head and shoulders. A snake does not have shoulders; so it might slither (蜿蜒滑行) away. 2) Dogs are OK for public places because they are social animals, and people like them. Snakes are not OK for public places because they are not social, and some people are terrified of them.

Stadium Helmet

Americans are known for their love of sports. Unfortunately, good tickets to games are expensive, so some fans have to sit in the backward sections. This invention, patented in 2000, is designed for these fans. Featuring a built-in radio, binoculars (望远镜), a cooling fan, and a helmet for falling litter, this design transforms the stadium experience.

Bacon Alarm Clock

When you think about it, waking to the dreadful, blaring noise of an alarm clock is a terrible way to start the day. However, this clock could change that. You simply put a piece of frozen bacon in the alarm clock, set the alarm, and go to sleep. The clock gently wakes you up with the mouth watering smell of bacon the next morning, just like waking up on a Sunday morning to the smell of mom cooking breakfast. Who said there’s no time to eat breakfast?

Toilet Lock

In 1969, a patent was issued for a really bad idea the toilet seat lock. First of all, fishing for your keys when you have to go seems very unpleasant. Then there is the possibility of losing the key altogether. What about guests? Just think that you would have to ask permission for the bathroom. Of course, there is the ultimate question: Why would you lock it in the first place?

1.Snake Leash was designed to 　　　　 .

A. take a snake for a walk　　 B. keep off a snake

C. catch a snake　　 D. keep dogs and snakes together

2.What can be inferred about the backward sections?

A. They are close to the center of a stadium.

B. They are for fans who have poor eyesight.

C. They are for fans who can’t afford to buy good tickets.

D. They are in the center of a stadium.

3.Which of the following inventions can help to save your time?

A. Toilet Lock.　　 B. Bacon Alarm Clock.　　 C. Snake Leash.　　 D. Stadium Helmet.

高二英语阅读理解中等难度题查看答案及解析

One of my close friends made great progress in her studies so her teachers ___ her, and I _____ her.

A. were happy with; was happy with       B. were happy for; was happy for

C. were happy with; was happy for        D. were happy for; was happy with

高二英语单项填空简单题查看答案及解析

. Great ____have been made in the field of computer science in the past decades.

高二英语单项填空简单题查看答案及解析

There was great interest when a big hole mysteriously appeared in the middle of a field. Engineers were called in to explain how it had got there. They offered various explanations but were not at all sure how the hole had been caused, it was thought that a large bomb which came suddenly exploded, but it was not possible to prove this. A simple, but highly improbable explanation was offered by a man who declares to know well about “flying saucers”; the strange objects which are round in shape and are said to visit the earth from outer space. The man’s explanation may have been nonsense (胡说八道), but at least it was imaginative. At any rate, it was far more interesting than the one given by the army.

After examining the ground carefully the man declared to have seen special marks on the soil quite near the hole, these, he said, could only have been caused by a flying saucer. Moreover the leaves on some bushes nearby had turned yellow because of a strange hot gas which had come from the saucer just before it landed. Even a small tree some way off appeared to have been burnt slightly. A small piece of metal found in the hole itself gave further proof that a strange object had been there. According to the man, it was quite clear that people from another world had been going around the earth trying to pick up information, when something had gone wrong. Because of this they had been forced to land in a field so that the damage could be repaired. The hole had been caused when the saucer struck the earth, while the strange marks nearby were made when it took off again. This, said the man, was the simplest explanation of how the hole had appeared. Judging from the interest the public took in the matter, there must be quite a few people who secretly believe or hope that this simple explanation is the true one.

1.What aroused public interest?

A. A mysterious hole in a field.              B. Various explanations offered by experts.

C. A simple explanation given by a man.      D. The shape of the flying saucers.

2.The author thought the man’s explanation was________.

A. boring but imaginative                  B. reasonable and interesting

C. meaningless but interesting              D. mysterious and unbelievable

3.The man found a lot of proofs except ____.

A. special marks on soil near the hole     B. yellow leaves on some bushes nearby

C. a small piece of meal in the hole       D. the remains of the flying saucer

4.It’s said the outer-space people were circling the earth _______.

A. to repair their saucer                 B. to strike the earth

C. to. collect information              D. to make strange marks

高二英语阅读理解简单题查看答案及解析

— So hard ______ in the past few months that he has made great progress in English.

— I can see that; only a few mistakes ______ in the exam.

A．has he worked; did he make

B．he has worked; did he made

C．he has worked; he made

D．has he worked; he made

高二英语单项填空中等难度题查看答案及解析

—So hard _____ in the past few months that he has made great progress in English.

—I can see that; only a few mistakes _____ in the exam.

A.has he worked; did he make        B. he has worked; did he make

C.he has worked; he made           D. has he worked; he made

高二英语单项填空中等难度题查看答案及解析

一You’ve made great progress in your survey, haven’t you?

——Yes，but some problems among the youngsters still remain——．

A．settled    B．settling    C．to settle D．to be settled

高二英语单项填空简单题查看答案及解析