问题 单项选择题

关于流行病学,下列哪种说法正确

A.从个沐的角度研究疾病和健康

B.只研究传染病的流行和防治

C.只研究慢性病的危险因素

D.研究人群中疾病和健康的分布及其影响因素

E.无法研究原因不明疾病

答案

参考答案:D

阅读理解

阅读理解。

     If you are planning to study in the United States, you need to consider several factors. Everyone has

different opinions about where is the best place to live in. Also, the best places to live are not always home

to the best schools. Finally, many schools specialize in different areas of study. The Massachusetts Institute

of Technology, for example, is a great school for computer science and technology-related fields of study.

However, if you want to study oceanography (海洋学), your interests may be better served by attending

school in a place that is on a coastline or near the ocean.

     Now I am sure that you know which schools are considered the best in the country. So I will tell you

about which states I believe are the best to live in.

     California is a nice state. Northern California specifically has very good weather. Los Angeles in Southern

California is another story though. Life in Los Angeles is full of excitement and fast,and sometimes dangerous.

As for me, I enjoy the time I spent in Massachusetts, Virginia and Maryland and these states have a lot of

history and culture. The weather is not as perfect as California, but it is still quite nice. My favorite area of

America is the Mid-west. Middle America, I think, is home to the true American sense of values. In addition,

there are many good universities there.

     Also, you need to think about your likes and dislikes and then research the various states. You like sunshine

and hate snow? Then you probably won't like the Midwest or even the Northeast. Open space, nature and

peace and quiet? Then you probably should stay away from America's large cities. Are you interested in

government? Then Washington D.C. is the only place for you. Whatever you decide, put some thought into it.

The place you live could be the difference between a great study-abroad experience and a state of great

suffering on earth.

1. From the first paragraph we can conclude (得出结论) that in the USA _____. [ ]

A. all colleges and universities lie in big cities

B. all colleges and universities lie in beautiful places

C. famous colleges and universities lie in nice places

D. famous colleges and universities may not lie in nice places

2. What should be considered first if you want to study in the USA? [ ]

A. The climate.

B. The scenery.

C. The study condition.

D. The living condition.

3. From the third paragraph we can find that _____. [ ]

A. California is the best place to live in

B. California is the worst place to live in

C. California is a state with different climates

D. California is a small state in the USA

4. If you study in Middle America, you can probably _____. [ ]

A. find the best universities

B. feel the real character of the nation

C. meet the most famous professors there

D. face more difficulties

5. From the last paragraph of this passage we can get to know that _____. [ ]

A. Washington is the largest city in the USA

B. Washington is the political centre of the USA

C. you can't find sunshine in the Midwest

D. you can't find any universities out of big cities in the USA

探究题

接触面的情况,你认为滑动摩擦力与压力比值的大小反映了________________ 。

(3)综合上述发现,小明推测,要使五盒叠放在一起的牛奶在上述水平桌面上匀速直线运动,弹簧测力计的示数应该为_____________N。

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