Question

【题目】根据短文理解，选择正确答案。
Dust on furniture may be bad news for waistlines (腰围). 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 (蛋白质) 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 (脱落) 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】据世界癌症研究基金会（WCRF）的一项新研究发现，近一半女性因为其超大腰围而导致癌症危险大增。研究人员表示，腰围过大还会增加罹患糖尿病和心脏病的危险。

（1）B推理判断题。根据第三段第二句Studies found that some materials in the dust could turn on a protein (蛋白质) called PPAR-gamma 1.研究发现在灰尘当中的一些材料可能转变成叫PPAR-gamma 1的蛋白质。第五句Researchers think this protein may be involved in obesity.研究者认为这种蛋白质可能与肥胖有关。故选B。

（2）A主旨大意题。根据第一段第一句Dust on furniture may be bad news for waistlines (腰围). 家具上的灰尘能使腰围增粗。Studies found that some materials in the dust could turn on a protein (蛋白质) called PPAR-gamma 1.研究发现在灰尘当中的一些材料可能转变成叫PPAR-gamma 1的蛋白质。第五句Researchers think this protein may be involved in obesity.研究者认为这种蛋白质可能与肥胖有关。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 (脱落) by people or pets.动植物油通过人或宠物脱落的毛发或皮肤进入到房子的灰尘。“房子里的灰尘能使我们变胖吗”？可知A项符合题意。