Question

【題目】根據(jù)短文理解，選擇正確答案。
Dust on furniture may be bad news for waistlines (腰圍). But it's far too early to add dusting to a weight-loss plan. Dietary fats and other materials that make up indoor dust can send a signal to human fat cells, telling them to grow. That process, in turn, might slow the body's rate of burning energy. Such changes could add to any weight problems a person might have.
“We don't know what that means to long-term health and certain diseases yet,” says Heather Stapleton, one of the study's authors. But she notes that her team's findings also raise a question of whether pollutants in dust might play some role in the growing, global problem of obesity (肥胖).
Stapleton and her colleagues collected dust from homes and offices. Studies found that some materials in the dust could turn on a protein (蛋白質(zhì)) called PPAR-gamma 1. It's found in many human tissues. Turning this protein on can cause fat cells to grow. Researchers think this protein may be involved in obesity. But a second study now finds evidence that certain fats are mostly to blame. Cooking oils may send out some of these fats into the air, where they eventually find their way into house dust. Or, the authors say, the fats might enter house dust as part of the hair or skin cells shed (脫落) by people or pets.
“While the findings are amazing,” says Mitchell Lazar, another study author, “these findings need to be taken as very limited.” Indeed, he adds several cautions about how the findings should be understood. “For one thing, people eat these fats in foods all of the time. That is likely to be a lot more than would be consumed from indoor dust,” he said.
（1）What do we know about PPAR-gamma 1?
A.It comes from dust.
B.It leads to weight gain.
C.It can help get rid of dust.
D.It only appears in human bodies.
（2）What's the best title for the text?
A.Can house dust make us fat?
B.Why is it important to clean?
C.Anything to do to deal with dust?
D.What is the best way to lose weight?

Answer 1

【答案】
（1）B
（2）A
【解析】據(jù)世界癌癥研究基金會（WCRF）的一項新研究發(fā)現(xiàn)，近一半女性因為其超大腰圍而導致癌癥危險大增。研究人員表示，腰圍過大還會增加罹患糖尿病和心臟病的危險。

（1）B推理判斷題。根據(jù)第三段第二句Studies found that some materials in the dust could turn on a protein (蛋白質(zhì)) called PPAR-gamma 1.研究發(fā)現(xiàn)在灰塵當中的一些材料可能轉變成叫PPAR-gamma 1的蛋白質(zhì)。第五句Researchers think this protein may be involved in obesity.研究者認為這種蛋白質(zhì)可能與肥胖有關。故選B。

（2）A主旨大意題。根據(jù)第一段第一句Dust on furniture may be bad news for waistlines (腰圍). 家具上的灰塵能使腰圍增粗。Studies found that some materials in the dust could turn on a protein (蛋白質(zhì)) called PPAR-gamma 1.研究發(fā)現(xiàn)在灰塵當中的一些材料可能轉變成叫PPAR-gamma 1的蛋白質(zhì)。第五句Researchers think this protein may be involved in obesity.研究者認為這種蛋白質(zhì)可能與肥胖有關。第三段最后一句the authors say, the fats might enter house dust as part of the hair or skin cells shed (脫落) by people or pets.動植物油通過人或?qū)櫸锩撀涞拿�發(fā)或皮膚進入到房子的灰塵�！胺孔永锏幕覊m能使我們變胖嗎”？可知A項符合題意。