(08·福建E篇)

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 flaws in studies that had reported associ-

ations 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（發(fā)生率）faster than any other cancer in the United States.

But questions have been raised about sunscreen and whether it may have the 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.

72.The underlined word“flaws”in the 2nd paragraph most probably means        .

A.evidences                    B.facts                         C.faults                     D.failures

73.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

74.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

75.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

答案  72.C  73.B  74.D  75.A

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源： 題型：閱讀理解

 (08·福建A篇)

After the Summer Olympics are over,when all the athletes and viewers have gone home and the television audience has switched off,another group of athletes and fans will arrive at the host city,and another competition will begin.These are the Paralympics,the games for athletes with a disability.But in Beijing in 2008,for the first time,one of the greatest paralympians will not be taking part.

She is a British athlete by the name of Tanni Grey-Thompson.Born with spina bifida（脊椎裂）which left her paralysed from the waist down,Tanni used a wheelchair from the age of 7.At first,she was not keen on sport,apart from horse riding,which gave her a sense of freedom.But in her teens,she started taking sports more seriously.She tried swimming,basketball and tennis.Eventually she found athletics, and never looked back.

Indeed,Tanni’s athletic career took off.In 1984,when she was 15,she pulled off a surprise victory in the 100 metres at the Junior National Wheelchair Games.

In 1988,Tanni went to her first Paralympic Games in Seoul.She won bronze in the 400 metres.Even greater success followed at the 1992 Barcelona Paralympics.Tanni won gold in the 100,200,400 and 800 metres relay,setting two world records in the process.In the same year she achieved the first of her six London Wheelchair Marathon victories.

Tanni’s enduring success has been part motivation(動機(jī)），part preparation.“The training I do that enables me to be a good sprinter(短跑運(yùn)動員）,enables me to be good at a marathon too.I train 50 weeks of the year and that keeps me prepared for whatever distance I went to race...I am still competing at a very high level,but as I get older things get harder and I want to retire before I fall apart.”

Indeed Tanni retired finally after the Visa Paralympic World Cup in 2007.Her wish is to coach young athletes for Beijing 2008 Olympic Games.

In spite of ups and downs,she never takes her fate lying down.In her splendid life,she has won an amazing eleven gold medals,four silvers and one bronze in a series of Paralympics—a top level athletic career covering two decades.She has won the London Wheelchair Marathon six times,more than any other competitor,and she has set over thirty world records.

What advice does she have for young athletes?“Work hard at your studies,and then train,train and train again.”

56.Which of the following sports did Tanni like before thirteen?

A.Basketball.            B.Swimming.                C.Tennis.               D.Horse riding.

57.When did Tanni win her first Olympic gold medal?

A.In 1984.               B.In 1988.                    C.In 1992.                    D.In 2007.

58.The underlined word “that” in the 5th paragraph refers to        .

A.fifty weeks’ training                      

B.being a good sprinter

C.training almost every day                  

D.part motivation and part preparation

59.What’s the right order of the events related to Tanni?

a.She works as a coach.

b.She took up athletics.

c.She won four gold medals in Barcelona.

d.She competed in her first Paralympic Games.

e.She achieved a victory in her first London Wheelchair Marathon.

A.b,d,c,e,a                     B.a,d,b,c,e                    C.a,d,c,e,b                    D.b,d,a,e,c

60.What can we learn from Tanni’s success?

A.Union is strength.                     B.Never too late to learn.

C.Well begun is half done.               D.No pains,no gains.

查看答案和解析>>

同步練習(xí)冊答案