Question

【題目】Known as GC-1, the drug reportedly speeds up metabolism（新陳代謝）, or burning off, of fat cells. “GC-1 dramatically increases the metabolic rate, essentially transforming white fat, which stores extra calories and is associated with obesity and metabolic disease, into a fat like calorie-burning brown fat,” said Kevin Phillips, a researcher in Houston.

Until several years ago, scientists thought that only animals and human babies have energy-burning, "good" brown fat. “It is now clear,” Phillips said, “that human adults do have brown fat, but appear to lose its calorie-burning activity over time.” White fat has a bad effect on people when the body has too much of it. Some published research shows that people who have more brown fat have a reduced risk of obesity. Researchers are now working on ways to “brown” white fat, or change it into brown fat.

GC-1 works, according to Phillips. He said he and other researchers have tested the drug in hundreds of mice. Obese mice, both genetically obese and those with diet-induced obesity, received GC-1 treatment daily. Genetically obese mice lost weight and more than 50 percent of their fat mass in approximately two weeks, Phillips reported. He said mice with diet-induced obesity experienced similar improvements. The drug also caused adaptive thermogenes（適應(yīng)性發(fā)熱）in fat cells from mice. Cells grown in a dish, as well as tissue samples taken from obese mice, showed evidence of white-fat browning. “Our data prove that GC-1 is a novel fat-browning agent that may have use in the treatment of obesity and metabolic disease,”Phillips said.

The drug has not yet been tested for weight loss in humans. However, Phillips said it wouldn’t be long before it was used as a way of losing weight.

【1】What is the writer's purpose of writing this passage?

A. To prove the harm of a new drug.

B. To introduce a new drug to people.

C. To explain the development of a new drug.

D. To inform people of some health knowledge.

【2】In the past, people held the belief that ________.

A. human babies have brown fat

B. animals don't have brown fat

C. only human adults have brown fat

D. brown fat may lose its activity over time

【3】What can we know about GC-1?

A. It can be used to treat obesity.

B. It is a cure for heart disease.

C. It is a drug intended for mice.

D. It has been sold in the drug store.

【4】Which of the following can make people lose weight?

A. Increasing more white fat.

B. Burning off more brown fat.

C. Changing white fat into brown fat.

D. Slowing down the activity of brown fat.

Answer 1

【答案】

【1】B

【2】A

【3】A

【4】C

【解析】本文向我們介紹了一種幫助燃燒脂肪來減肥的新藥GC-1。

【1】B

推理判斷題。根據(jù)第一段Known as GC-1,the drug reportedly speeds up metabolism（新陳代謝）,or burning off, of fat cells.和下文研究試驗(yàn)結(jié)果和最后一段The drug has not yet been tested for weight loss in humans. However, Phillips said it wouldn’t be long before it was used as a way of losing weight.可知，本文是向我們介紹了一種幫助減肥的新藥。故選B。

【2】A

細(xì)節(jié)推理題。根據(jù)第二段Until several years ago, scientists thought that only animals and human babies have energy-burning, "good" brown fat.可知，以前人們認(rèn)為只有動(dòng)物和嬰兒才有燃燒能量的棕色脂肪，故選A。

【3】A

推理判斷題。根據(jù)第一段Known as GC-1, the drug reportedly speeds up metabolism（新陳代謝）, or burning off, of fat cells.第三段“Our data prove that GC-1 is a novel fat-browning agent that may have use in the treatment of obesity and metabolic disease,”和最后一段it wouldn’t be long before it was used as a way of losing weight.可知，GC-1是治療肥胖的一種藥，故選A。

【4】C

細(xì)節(jié)推理題。根據(jù)第二段Some published research shows that people who have more brown fat have a reduced risk of obesity.和Researchers are now working on ways to “brown” white fat, or change it into brown fat.可知，有更多棕色脂肪的人肥胖的風(fēng)險(xiǎn)較小，研究人員正研究把白色脂肪變成棕色脂肪，以幫助減肥。故選C。