The Mekong River Commission has found no evid...

The Mekong River Commission has found no evidence ______ the dams on the upper reaches have an influence on the water flow downstream．

A．which      　　B．that         　　C．where   　　 D．what

高三英语单项填空中等难度题查看答案及解析

The Mekong River Commission has found no evidence ________ the dams on the upper reaches have an influence on the water flow downstream.

A．that              B．which            C．where            D．what

高三英语单项填空中等难度题查看答案及解析

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 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 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.

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

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

2.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

3.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

4.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

高三英语阅读理解中等难度题查看答案及解析

A new study has found no evidence that sunscreen, commonly used to reduce the risk of skin caner, actually increases the risk.

Researchers from the University of lows based their firdings on a review of 18 earlier studies that looked at the associstion between sunscreen use and melanoms(黑素瘤). They said that they found flaws 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 helpsprevent skin cancer, which is increasing in incidence (发生率) 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 concer—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.

1.The underlined word “flaws” in the 2^nd paragraph most probably means ________.

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

2.People with fair skin and freckles ________.

A.seldom use sunscreen                  B. are more in danger of skin concer

C. can be free from the harm of the sun     D. often expose themselves to the sun

3.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

4.Which of the following can be the beat 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

高三英语阅读理解中等难度题查看答案及解析

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.

1.People with fair skin and freckles________.

2.We can learn from the passage that________.

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

高三英语阅读理解中等难度题查看答案及解析

Since no evidence has been found so far ________ he was guilty, he has to be set free.

A．before           B．whether          C．that              D．when

高三英语单项填空简单题查看答案及解析

Wang, I hear that you ______ along the Mekong River. Have you got everything ready?

A. traveled          B. are traveling        C. have traveled         D. travel

高三英语单项填空简单题查看答案及解析

It was my sister ________ first had the idea to cycle along the entire Mekong River from ______ it began to where it ends.

A. who; which           B. who; where          C. that; which           D. that; what

高三英语单项填空中等难度题查看答案及解析

Up till now, there has been no scientific evidence about ________ caused the death of dinosaurs.

A. what is it that　　 B. what it was that　　 C. it was what　　 D. what is it

高三英语单项填空简单题查看答案及解析

［1］A new study has found evidence of aggressive behavior in children who drink four or　 more servings of soft drinks every day．

［2］The mothers of 3,000 five-year-olds took part in the study．They were asked to keep a record of how many servings of soft drinks their children drank over a two-month period and keep records of how they behaved．The researchers found that 43 percent of the boys and girls drank at least one daily serving of soda．Four percent of the youngsters had four or more sodas to drink every day．

［3］Children who drank the most soda were more than two times likely to show signs of aggression．“For the children who consumed four or more soft drinks per day，we see an association between aggressive behaviors，attention problems and withdrawn behaviors．”Shakira Suglia says．The aggressive behaviors included destroying possessions belonging to others，taking part in fights and physically attacking people．

［4］Shakira says the researchers identified the link after they considered the factors like the child’s age and sex．They also considered ____________，such as whether the boys and girls were eating sweets or given fruit drinks on a normal day．In addition，the researchers examined parenting styles and other social conditions that might be taking place in the home．

［5］It is not quite clear why young children who drink a lot of soda have behavior problems．However,a substance often found in soft drinks is caffeine，which helps to make people feel energetic．Doctor Suglia suggests that caffeine could be causing the children to be more aggressive．

［6］The research is part of a larger study called the Fragile Families and Child Well-being Study．It follows 5．000 poor mothers and their children in 20 American cities．

1．What is the main idea of the text？(no more than l2 words)

2．What does the underlined word“they”in Paragraph 2 probably refer to?(no more than 5 words)

3．List three aggressive behaviors according to the text．(no more than 12 words)

4．Fill in the blank in Paragraph 4 with proper words．(no more than 3 words)

5．Complete the following statement with one word from Paragraph 5．

People will often become _____________ when they have some coffee，in which caffeine is the major chemical．

高三英语信息匹配中等难度题查看答案及解析