A
Starting the day on an egg could keep your blood pressure under control,research suggests.Scientists have shown that eggs produce proteins with a function similar to that of powerful blood pressure-lowering drugs.
The research,from the University of Alberta in Canada,showed that when eggs come in contact with stomach enzymes (酶) they produce a protein that acts in the same way as Ace inhibitors,but more work is needed to show the effects outside a lab and in the human body.
Earlier this month,British researchers declared that,contrary to popular beliefs,it is healthy to go to work on an egg.They concluded that the type of cholesterol (胆固醇) found in eggs has little effect on increasing heart disease risks.
Researcher Professor Bruce Griffin,from the University of Surrey,said,“The wrong beliefs linking egg eating to high blood cholesterol and heart disease must be corrected.The amount of fat in our diet has an effect on blood cholesterol that is several times greater than the relatively small amounts of cholesterol found in eggs.The UK public do not need to be limiting the number of eggs they eat.They can be encouraged to include them in a healthy diet as they are one of nature’s most nutritious foods.”
The British Heart Foundation dropped its three-egg-a-week limit in 2005.However,almost half of Britons believe the limit still applies.
1.From the text we know that Ace inhibitors are .
A.a kind of protein B.a kind of food
C.a kind of medicine D.a kind of illness
2.According to what Professor Bruce said,eggs .
A.are the most nutritious food B.can be included in a healthy diet
C.have no effect on blood cholesterol D.are forbidden to be eaten in the UK
3.We can infer from the text that .
A.stomach enzymes mixed with eggs can cure heart diseases
B.drugs to lower blood pressure will be replaced by eating eggs
C.most Britons agree the three-egg-a-week limit should be dropped
D.about 50% of Britons think eating an egg a day is bad for their health
4.The text is meant .
A.to introduce a medicine made from eggs B.to introduce scientific findings about eggs
C.to tell people how to lower their blood pressure D.to advise people to eat as many eggs as possible
语篇解读:本文是一篇说明文,主要讲述了关于鸡蛋的科学研究发现:鸡蛋在消化酶的作用下能产生一种可以降低血压的蛋白质,可以把血压控制在一定的范围内,但是为了验证这个结论仍需要大量的人体实验。
答案及剖析:
1.A 推理判断题。根据第一段中的Scientists have shown that eggs produce proteins with a function similar to that of powerful blood pressure-lowering drugs.以及第二段中的...when eggs come in contact with stomach enzymes (酶) they produce a protein that acts in the same way as Ace inhibitors可知,鸡蛋和消化酶一起作用时会产生一种蛋白质,作用类似于强有力的降血压药物,故选A。
2.B 细节理解题。根据第四段中的They can be encouraged to include them in a healthy diet as they are one of nature’s most nutritious foods.可知,鸡蛋被认为是自然界中最有营养的食物之一,故选B。
3.D 推理判断题。根据最后一段The British Heart Foundation dropped its three-egg-a-week limit in 2005.However,almost half of Britons believe the limit still applies.可知,几乎一半的英国人认为一天一个鸡蛋有害于身体健康,故选D。
4.B 主旨大意题。根据开头一段Scientists have shown that eggs produce proteins with a function similar to that of powerful blood pressure-lowering drugs.可知,本文是在介绍一个关于鸡蛋的科学发现,故选B。
