考情前瞻：2021年考研英语医学类阅读理解模拟题及答案（十三）

发布时间：2020-10-11

英语是考研初试当中比较拉分的科目，历来令不少考生又爱又恨。许多考生的英语都有很大的进步空间，因此英语该如何学就成为了众多考生关心的重点。想要学好英语，实战经验很重要。下面，51题库考试学习网为大家带来考研初试英语科目的一些模拟试题，正在备考的小伙伴赶紧练起来吧。

IF YOU\'RE CONFUSED BY ALL the news about the health effects of eating fish， you\'re not alone. On one hand， the omega-3 fatty acids in fish are known to reduce the risk of heart disease， as the American Heart Association reminded us two weeks ago when it restated its recommendation that everybody eat at least two fish servings a week. On the other hand， fish that feed in contaminated waterways contain high levels of mercury， which can lead to cognitive problems in developing brains. That\'s why pregnant women and nursing mothers are advised to limit their consumption.

As if that weren\'t confusing enough， two new studies published last week in the New England Journal of Medicine investigated the possible effects of mercury on the heart， and they seem to have reached contradictory conclusions. One found no clear link between mercury levels and heart disease; the other found that men with high levels of mercury in their toenails were more likely to suffer a heart attack than those with low levels. What are we to make of this? The first thing to remember is that this is how science proceeds， by fits and starts and seemingly contradictory results that get resolved only by further study. The second is that not all fish are created equal.

Compared with all the other things you might eat， fish are an excellent source of protein. They tend to eat algae as part of their natural life cycle， converting it into omega-3 fatty acids that can improve your cholesterol profile. But it\'s also true that our waterways have become increasingly contaminated with all sorts of pollutants， including mercury， and that these pollutants tend to accumulate at different levels in different species. The fish most at risk are predators high in the pelagic food chain， such as swordfish and sharks (see chart)。

It was to test the effects of mercury on the heart that the two new studies compared the mercury levels in clippings from toenails， where heavy metals tend to be deposited. In one study， researchers led by Dr. Eliseo Guallar at Johns Hopkins found that European and Israeli men with the highest mercury levels were nearly 2.2 times as likely to have a heart attack as those with the lowest levels. The other study， led by Dr. Walter Willett at the Harvard School of Public Health， looked at a selection of American men and found no connection between mercury exposure and risk of heart disease， although Willett told me a “weak association” cannot be ruled out.

For most of us， eating two servings of fish a week should not pose any problems. Guallar， who hails from coastal Spain， continues to flavor his paella with salmon， which has negligible mercury levels. Willett eats swordfish only about twice a month——because of its expense， not any fear of mercury. Fish-oil supplements are high in omega3 fatty acids and probably don\'t contain as much mercury as whole fish. But they don\'t taste nearly as good.

注(1)：本文选自Time; 12/9/2002， p99;

注(2)：本文习题命题模仿对象2005真题Text 1;

1. In the opening paragraph， the author introduces his topic by

[A]making a comparison

[B]justifying an assumption

[C]posing a contrast

[D]explaining a phenomenon

2. The phrase “by fits and starts”(Line 6， Paragraph 2) most probably means _______.

[A]something happens smoothly

[B]something keeps starting and then stopping again

[C]something deserves a lot of effort

[D]something is troublesome

3. Clippings from toenails were chosen for the research most probably because _______.

[A]they are more likely to contain mercury

[B]they influence a person‘s heart

[C]they can be easily obtained

[D]they are connected with the heart

4. The views of Dr. Eliseo Guallar and Dr. Walter Willett are ______.

[A]identical

[B]similar

[C]opposite

[D]complementary

5. What can we infer from the last paragraph?

[A]Fish is no threat to Man.

[B]Do not be frightened by some fish.

[C]Eat Fish-oil supplements instead of fish.

[D]Taste is more important than the safety of the food.

答案：CBACB

以上就是51题库考试学习网为大家带来的全部内容，希望能给大家一些帮助。51题库考试学习网提醒：在最后阶段，调整自己的心态也是非常重要的，每年都有考生临考前放弃，所以小伙伴们要注意不要给自己太大的压力哦。另外，小伙伴们如果还有其他关于考研信息的疑问，也可以留言咨询哦。

下面小编为大家准备了 研究生入学 的相关考题，供大家学习参考。

声明：本文内容由互联网用户自发贡献自行上传，本网站不拥有所有权，未作人工编辑处理，也不承担相关法律责任。如果您发现有涉嫌版权的内容，欢迎发送邮件至：contact@51tk.com 进行举报，并提供相关证据，工作人员会在5个工作日内联系你，一经查实，本站将立刻删除涉嫌侵权内容。