D

Starting the day on an egg could keep your blood pressure(血壓) 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 (膽固醇) 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．

53．From the text we know that Ace inhibitors are______．

A．a(chǎn) kind of medicine       B．a(chǎn) kind of protein  

C．a(chǎn) kind of illness         D．a(chǎn) kind of food

54．According to what Professor Brcue said, eggs______．

A．a(chǎn)re the most nutritious food．

B．have no effect on blood cholesterol

C．can be included in a healthy diet  

D．a(chǎn)re forbidden to be eaten in the UK

55．We can infer from the text that______．

A．drugs to lower blood pressure will be replaced by eating eggs

B．stomach enzymes mixed with eggs can cure heart diseases

C．most Britons agree the three-egg-a-week limit should be dropped

D．a(chǎn)bout 50% of Britons think eating an egg a day is bad for their health

56．The text is meant______．

A．to introduce scientific findings about eggs

B．to introduce a medicine made from eggs

C．to tell people how to lower their blood pressure

D．to advise people to eat as many eggs as possible

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D. point out the serious effect of global warming

2..

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