What was the attitude of doctors towards weight training in health im-考呗网题库移动版

单选题 What was the attitude of doctors towards weight training in health improvement?

A．Positive
B．Indifferent
C．Negative
D．Cautious

参考答案C

解析: 本题的关键是对“These fitness spas did not seem to benefit financially form the aerobicfitness movement to better health，since medical opinion suggested that weight-training programs offered few，if any，health benefits”一句的理解。这句话由前面的主句和since引导的从句组成。主句的意思是“这些健身场所似乎没有从这场追求健康的有氧操风潮中受益”，从句由since引出了原因：医学观点认为，健身锻炼项目不会给健康带来多少益处。few是带有否定意义的词，表示很少，几乎没有。if any，“如果还有益处的话”，也是对存在益处的疑问。由此可见，医学观点(也就是医生的观点)对weighttrainin9的态度应该是非常消极的，可以选择C。这里不应选择D，因为cautious指在诸多积极因素中存在一定的消极因素，应谨慎对待，不应过分积极，这与文意不符。

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单选题 People were given physical fitness tests in order to find out

A．how well they could do in athletics
B．what their health condition was like
C．what kind of fitness center was suitable for them
D．whether they were fit for aerobic exercise

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单选题 Recent studies have suggested that weight training

A．has become an essential part of people's life
B．may well affect the health of the trainees
C．will attract more people in the days to come
D．contributes to health improvement as well

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单选题 根据以下内容，回答题。
The immune system is the body's defender. It identifies, tracks down, and destroystroublemakers before they can hurt the body. Those troublemakers maybe, for example, bacteriafrom a cut or splinter, a measles germ, a cold bug, or even a cancer cell.
These invaders try to take over our tissues and feed off our bodies' nutrients. If they succeed,we become sick or, sometimes, even die. It's the job of our immune systems to destroy theseinvaders before they destroy us.
Say you picked up a flu virus last week. Perhaps it entered your body through a cut, from adrinking glass, or from the air you breathe. Of course, you didn't feel it, but the virus made its wayinto your bloodstream. As soon as it entered your body, it began to reproduce. Viruses have only one goal: to take over your cells. Once inside your body, viruses try to enter cells and disrupt their normal work. If left alone, these viruses would hurt so many cells that you would weaken, or worse,get a serious disease.
But this flu virus should not be so complacent as it seems to be. As it reproduces in your bloodstream, the virus is met by a certain kind of white blood cell, the lymphocytes. The lymphocytes are the foot soldiers that keep you alive.
The number of lymphocytes in your body is hard to imagine. Thousands of them could fit in theperiod at the end of this sentence. Your body holds about a trillion--that's 1000000000000 ofthem, or about 3000 in every drop of blood. Since you began reading this sentence, over 800000 ofthem have been created and destroyed.
Some of these lymphocytes pass through a small walnut-sized organ called the thymus. Thethymus is the base of the neck. Here, special hormones turn lymphocytes into fighting cells, calledT cells.
Tcells ove one terrific talent:they can tell the difference between friend and foe ;what shouldbe in our bodies and what shouldn't. They do not affect the body's healthy cells. Yet they attackeverything that is foreign to our bodies, such germs, transplants, and even our own ceils which havebecome abnormal, as in the case of cancer.
What is the function of our immune system?

A．To take over our tissues and feed off our bodies'nutrients
B．To prevent bacteria or germs from entering the body
C．To destroy the troublemakers in order that they might not hurt the body
D．To fight against T cells

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