Question

We live in a sweet world. The average American kid consumes more than 20 teaspoons of sugar per day, and adults eat 50% more sugar today than they did in the 1970s. We all know that too much sugar isn’t good for you. But did we know it could be dangerous? A team of researchers at the University of Utah used mice to conduct a study on the negative effects of sugar. They found it could have serious effects on people’s health.

Sugar is found not only in sweets and candies, but also in many household items like pasta and crackers.

During the 58-week-long study, mice were fed a diet containing 25% more sugar. This percentage equals a healthy human diet along with three cans of soda daily. The team found that these mice were twice as likely to die as mice fed a similar diet without the sugar. Though the mice did not show signs of obesity or high blood pressure, male mice were 26% less territorial and produced 25% fewer offspring than the other mice.

Scientists often use mice for research because they have a similar genetic（基因） structure to humans. “Since most substances that are dangerous in mice are also dangerous in people, it’s likely that those physical problems that cause those mice to have increased deaths also work in people,” says study author James Ruff of the University of Utah. Findings from this study reveal negative effects that are not as noticeable as weight gain or heart problems. Sugar can contribute to long-term changes in the body that can change development and even shorten lives.

Cutting sugar out of the American diet altogether may be difficult. But making the effort to control our nation’s sugar desire will provide for a truly sweeter future.

1.The study conducted by researchers aimed at learning about________

A. the advantages and disadvantages of sugar

B. the negative effects of sugar on people’s health

C. the genetic structure of mice

D. American’s diet

2.According to the study, which of the following statements is wrong?

A. Sugar can even shorten lives.

B. Sugar’s negative effects are not noticeable.

C. Mice are more likely to diet when fed a diet containing 25% more sugar.

D. Eating much more sugar can make mice put on weight and get high blood pressure.

3.From the passage we can infer_______

A. sugar plays a very important role in Americans’ diet

B. kids consume more sugar than adults in America

C. the study on human beings lasted 58 weeks

D. the genetic structure of mice is totally different from that of people

4.What’s the best title of the passage?

A. Living a sweet life

B. Kids consume much more sugar

C. Genetic structure of humans

D. Danger of sugar

Answer 1

1.B

2.D

3.A

4.D

【解析】

試題分析：糖已經(jīng)成為美國(guó)人日常飲食中非常重要的一部分，猶他大學(xué)的科學(xué)家通過對(duì)小白鼠進(jìn)行的實(shí)驗(yàn)研究發(fā)現(xiàn)過多的糖分會(huì)對(duì)人類健康產(chǎn)生不良影響甚至縮短人類壽命，因此呼吁人們控制每日糖分?jǐn)z取量。

1. team of researchers at the University of Utah used mice to conduct a study on the negative effects of sugar.科學(xué)家們用小白鼠做實(shí)驗(yàn)，試圖找出糖分對(duì)人類健康的不良影響。選B。

2. the mice did not show signs of obesity or high blood pressure可以看出，攝入糖分更多的那些小白鼠并沒有肥胖癥和高血壓的癥狀，選項(xiàng)D錯(cuò)誤。

3. average American kid consumes more than 20 teaspoons of sugar per day, and adults eat 50% more sugar today than they did in the 1970s.以及最后一段中Cutting sugar out of the American diet altogether may be difficult.可以看出糖在美國(guó)人日常飲食中是很重要的。選A。

4.文主要講科學(xué)家用小白鼠做實(shí)驗(yàn)，發(fā)現(xiàn)了過多的糖分對(duì)人體健康的危害。答案為D。

考點(diǎn)：考查社會(huì)科學(xué)類閱讀