HIGHFIELDCOMPREHENSIVESCHOOLSC-优题课

A new study has found no evidence that sunscreen, commonly used to reduce the risk of skin cancer, actually increases the risk.
Researchers from the University of Iowa based their findings on a review of 18 earlier studies that looked at the association between sunscreen use and melanoma (黑素瘤)．They said that they found faults in studies that had reported associations between sunscreen use and higher risk of melanoma.
Most health experts believe that by protecting the skin from the harmful effects of the sun, sunscreen helps prevent skin cancer, which is increasing in incidence (发生率) faster than any other cancer in the United States.
But questions has been raised about sunscreen and whether it may has opposite effect, perhaps by allowing people to remain exposed to the sun longer without burning.
The researchers said that among the problems with some earlier studies is that they often failed to take into account that those people most at risk for skin cancer--- people with fair skin and freckles (雀斑), for example--- are more likely to use sunscreen．As a result, it may appear that sunscreen users get cancer more often.
The studies, which generally relied on volunteers to recall their sunscreen use, were also unable to prove how well the products had been applied, said the new study.
People with fair skin and freckles.

A．seldom use sunscreen

B．are more in danger of skin cancer

C．can be free from the harm of the sun

D．often expose themselves to the sun

We can learn from the passage that.

A．sunscreen users get skin cancer more often

B．the volunteers have proved the effect of sunscreen

C．the new study was based on the experiences of volunteers

D．the number of skin cancer patients is increasing in America

Which of the following can be the best title for this passage?

A．Sunscreen to Prevent Skin Cancer

B．Sunscreen to Increase Skin Cancer

C．Skin Cancer Caused by Sunscreen

D．Skin Cancer Caused by Freckles

On April 24^th, another natural disaster—the oil spill(泄露) in the Gulf of Mexico, happened．Millions of dollars have been used to help stop the spill and to clean up the animals, beaches, and land spoiled by the oil．Unfortunately, when many of these chemicals are used, more damage is caused to the environment, especially to lives in the sea．
But governments seem to accept the risk of transporting millions of tons of oil by ship every day so that we can fill up our cars and drive around and cause even more environmental damage．Interestingly, the biggest companies in the world produce cars, and the next biggest supply the gasoline to make them run.
Of all of today's environmental disasters, an oil spill may actually be one of the least serious．Although oil is poisonous, it is a natural material．In the end, it breaks down naturally．In 1967 the tanker Torrey Canyon sank off the Scilly Isles near the coast of England and spilled 120,000 tons of oil into the ocean．If you go there today, you will find it hard to see any sign that it ever happened．
However, we should be thinking more about reducing our dependency on oil．Governments should be encouraging research into new technologies, such as cars run by solar power（太阳能）, electricity, hydrogen, and so on．Much of this research, in the past, was stopped by the oil, gas, and coal．
If the world's millions of cars were 10% more efficient（高效的）,we would need many fewer tankers crossing the oceans each year．If this happened, the risks of oil spills would be reduced, and the air we breathe would be cleaner and fresher, too．
What is the passage mainly talking about?

A．Oil spills pollution．	B．What oil pollution is．
C．Oil tanker accidents．	D．How to reduce oil pollution.

How does the author support the idea that oil spills are not as serious as people believe?

A．By giving a description．	B．By making an argument．
C．By giving an example．	D．By comparing．

Which suggestion is made for reducing oil tank accidents according to the passage?

A．We should build safer tankers in the near future．

B．We should develop new technologies to cut oil use．

C．Tankers should not be allowed to sail near the coastlines．

D．Countries should build more oil pipelines under the sea．

Where can you read this article?

A．In a story book．	B．In a science magazine．
C．In a novel．	D．In a travel guide．

It is well known that the Japanese people’s love of fish is almost as a bee’s interest in honey．As fish populations were decreasing, fishing companies were forced to fish further and further away from the shore．Then they had a big challenge－how to keep the fish fresh for longer．So they decided to keep the fish stored in freezers on the boats．But the public did not like frozen fish．So again the fishing companies had a new bigger challenge．What they decided to do was to have fish tanks on their boats．After catching fishes, they would put them in the tanks and keep them living there until they got back to shore．But in this protected environment, lacking predators (掠食者)，the fish stopped moving around．The Japanese public felt these dull fish did not taste fresh, which had an unpleasant effect upon sales．Once again the fishing companies had an even bigger challenge
Stop for a minute! Before we go any further, I would like to ask “What are your challenges? How do you handle an unexpected challenge?” May I think it this way that you should try to attack your challenges? Conquer（战胜） them with a Swiss army knife．Take the most proper and simple tool that you can adopt to deal with your situation.
Now back to our story．How did the Japanese finally figure out the fresh fish problem？Sharks! You might think the same．Sharks were caught and put into the tanks with other fishes．Don’t sharks eat fish? Well, they do eat a few fish, but they did also keep more fish active and alert (警觉的)．The fish stay fresh because they are challenged.
Now, try to keep yourself fresh by finding your own shark to offer yourself a challenge in your own business and career.
The main reason for the fishing company to fish in the far sea was that .

A．the fish resource near the shore was on the decrease

B．the fishes farther away from the sea tasted fresher

C．people would prefer eating fresh fishes to less fresh ones

D．it was getting harder and harder to keep fishes fresh

From the text we can learn that .

A．Japanese people love honey as much as a bee does

B．the fish kept in tanks didn’t sell well because of their taste

C．the fish stored in the protected environment tasted the best

D．the fish kept in tanks didn’t taste fresh because they died before reaching the restaurant

The underlined part of the last paragraph means “ .”

A．If you went fishing, you might do as the fishing companies did

B．Try to find a big shark, and you will meet your challenge

C．To succeed in life, you should always be ready to meet challenges

D．Sharks are usually compared to the challenges in people’s life

The purpose for the author to write the passage is to .

A．tell the readers “no pains, no gains”

B．tell the readers how the Japanese keep the fish fresh

C．advise readers to look for challenges to make progress

D．advise readers to find something difficult to do

American magician David Blaine left the glass box in which he had lived for 44 days without food on October 19．2003．Hundreds of people came to watch the end of his starvation experiment, which has become one of London’s main tourist attractions.
Looking thinner and darker, 30-year-old Blaine was taken out of his box over the River Thames and immediately went to hospital．He was then slowly reintroduced to food, a process doctors say could be life threatening．He had been drinking only water since September 5.
A native of Brooklyn, New York, Blaine first became known as a street magician in the early 1990s．He soon found himself doing magic tricks in bars for the likes of American actor Leonardo DiCaprio and his super model friends.
Over the last decade Blaine has become famous with a combination of breathtaking magic and clever tricks aimed at getting a lot of attention.
In 1999, he was buried in a coffin(棺材) for one week and, in 2000, he spent 62 hours in a giant block of ice．Last year he stood on top of a 25-meter pillar(柱子) in the center of New York for 35 hours before jumping into a pile of boxes.
“I think a lot of people are unable to accept that they’re able to do what they can do,” he said．“They don’t realize we can survive．The human being is an amazing creation.” But he seems to have suffered from spending so long in the glass box．He said that at times he was unable to see, had serious back pains and lost his sense of taste.
It is __________ for David Blaine to eat food after such a long starvation.

A．pleasant　　　

B．delicious　　　

C．dangerous

D．important

Having spent such a long time in the glass box, he suffered the following EXCEPT that __________.

A．he had become blind	B．he had serious back pains
C．he lost his sense of taste	D．he was in weak health

Which of the following can best describe David Blaine?

A．Serious　　

B．Adventurous

C．Mad　　　　　

D．Crazy

Which of the following is NOT true of David Blaine?

A．Blaine immediately went to hospital after he was taken out of his box.

B．Blaine was born and brought up in England.

C．In Blaine’s opinion, people can create a wonder．

D．Blaine didn’t have any food for 44 days.

In 2004，the World Health Organization，WHO，warned of a possible outbreak of another serious disease which may be even more deadly than SARS．The WHO believes that it is likely that bird flu will spread to human beings in the next few years．If it does，up to seven millions people could die from the disease．
Diseases like bird flu are caused by viruses，that is，tiny things which change and become more dangerous over time．When a new type of a common virus changes，it may be able to get past the body’s immune(免疫的)system．If that happens，humans are in great danger until a cure or treatment becomes available．
There have always been viruses and people always get sick，of course，but as we saw with SARS，the situation is more difficult today．People travel more than ever before，which means that disease can spread quickly and across large areas——in fact the whole world．
Scientists are already working on drugs that will prevent or limit the effect of a new virus，but the process takes time．It is just as important to make sure that countries，especially poor countries，are prepared to deal with the disease. New disease usually affect poor areas the most，so we must help develop health care in all countries．
The situation is more serious today because ．

A．people travel more	B．people don’t eat healthy food
C．there aren’t enough hospitals	D．scientists can’t find a cure

From this passage we know ．

A．bird flu will surely spread to human beings in the next few years．

B．a virus changes and become less dangerous over time．

C．SARS is 1ikely to come again in some years．

D．poor areas usually suffers more from new diseases than rich areas．

The possible title of this passage is

A．The Work of WHO

B．Scientists Are Working Hard on Drugs for Diseases

C．What Is a Virus

D．Virus Changes and Causes New Diseases Over Time