People were given physical fitness tests in order to find out-考呗网题库移动版

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

参考答案A

解析: 文章提到身体健康测试是在第二段第一句话“Historically，most physical—fitness tests have usually included measures of muscular strength and endurance，not for health—related leasons，but Drimarilybecause such fitness components have been related to performance in athletics”，这个句子的基本结构是主句+notfor(原因)+but(原因)。主句陈述了多数健康测试通常包含肌肉力量和耐力项目这个事实，从句给出了原因——首先澄清其原因与健康无关(not for health—related)，而后指出主要原因(primarily because)：这些健康因素(指肌肉力量和耐力项目)与运动水平相关。从这句话可以看出，人们参加健康测试与健康无关．可以排除B，而C和D文中都没提到。A所说的“how well they could do in athletics”与文中的“Derformance inathletics”意思是一样的，应该选A。

点击查看答案进入在线模考

你可能喜欢

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

点击查看答案进入在线模考

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

点击查看答案进入在线模考

单选题 What does the word "lymphocytes" in Para.4 mean?

A．Foot soldiers
B．Flu virus
C．White blood cells
D．Trouble makers

点击查看答案进入在线模考

hot热门搜索

你可能喜欢

延伸阅读