问题 单项选择题

一项调查研究表明,在普通人群中,与每晚睡眠时间保持在7至9小时的人相比,每晚睡眠时间少于4小时的人患肥胖症的危险高出73%,而平均每天只睡5小时的人,这种危险则高出50%。研究人员因此得出结论:缺乏睡眠容易使人变得肥胖。以下如果为真,最能支持上述结论的是()。

A. 缺乏睡眠与糖尿病发病率上升存在关联,而大部分糖尿病患者都比较肥胖

B.缺乏睡眠容易导致慢性疲劳综合征,从而使人不愿意参加体育锻炼

C.睡眠不足者与每晚睡眠时间在7至9小时的人拥有同样的饮食和运动习惯

D.睡眠不足会导致人体内消脂蛋白浓度下降,而消脂蛋白具有抑制食欲的功能

答案

参考答案:C

解析:题干的结论是“睡眠不足导致肥胖”。AB两项在“睡眠不足”和“肥胖”之间通过其他因素建立了一定的关联,有一定的支持力度。但没有C项支持力度强,C项 将其他因素都设置为一致,唯一的不同就是睡眠情况不同,从而排除他因,强调了唯一的因素就是睡眠不足,从而支持了题干的结论。故本题选C。D项说明睡眠不 足会导致食欲较少受到抑制,但食欲与肥胖的关系并未说明。

阅读理解

阅读理解(共15小题;每小题2分,满分30分)

A car needs gas to run and your body also needs food to work for you. Eating the right kind of food is very important. It can help your body grow strong to take care of what you eat.

There are four main food groups altogether. The dairy group has food like milk, cheese and sour milk. The other three groups are the meat and fish group, the fruit and vegetable group, and the bread and rice group. Each meal should have at least one food from all four main groups. With all these food together, you will be given enough energy during the day.

It is easy to get into bad eating habits. You may eat your breakfast in a hurry to get to school on time. Or you may not have time for a good lunch. It may seem easy to finish your supper with fish and chips all the time. But you will find yourself tired in these days and you can not think quickly.

Watching what you eat will help keep your body healthy and strong. It is also good to take some exercise. It will help you eat more if you take a walk or play games in the open air. Having a good eating habit with some exercise is the key to your health.

小题1:Which of the following diets do you think is the best one?

A.Eggs, tomatoes and chicken.

B.Milk, bread, cabbages and beef.

C.Corn, fish, cream and pork.

D.Rice, bean curd(豆腐), apples, fish and chicken.小题2: Which of the following is a good eating-habit?

A.Going to school without any breakfast

B.Eating fish and chips for supper all the time..

C.Having at least one food from all four groups each meal.

D.Having different food from all four food groups.小题3: In this passage the writer mainly tells us that _____.

A. every person needs food to grow well

B taking exercise can keep your body strong

C. the right kind of food with exercise will keep you healthy

D. enough energy helps people think more quickly

小题4:The underlined word “dairy” in the second passage means _____.

A.the food made out of cows such as milk and butter

B.she shop that sells milk and butter

C.a farm where cows are kept

D.a place where milk products are made.小题5:The best title for this passage is _____.

A.The Four Food Groups

B. A Healthy Diet

C.Your Body And Food

D.Food And Your Health

单项选择题