问题 单项选择题

某广告你一种新药对“上呼道感染”有很高的疗效,用该药治疗100例“上呼吸道感染”患者,其中95例患者72小时内症状消失,有效率高达 95%。你认为该结论

A.正确,因为有效率很高

B.正确,样本足够大

C.不正确,因为缺乏对照

D.不正确,因为没有随机抽样

E.不正确,应该用治愈率反映

答案

参考答案:C

解析:要说明新药对“上呼吸道感染”是否有效不能仅仅只有实验组,而没有对照组。一项临床试验研究没有设立专门的对照组是难以说明治疗措施与效果之间的关系的。

阅读理解

阅读表达。

     If you are worried about things and are under a lot of stress at work or school,then you are probably

not sleeping well. Worry can keep you awake,tossing and tuming in bed until the early hours of the moming when you eventually fall asleep. When you wake up.you don't feel refreshed.but tired and wom out and

unable to face a new day.

     Dr Henry Winkle,in a recent newspaper article entitled Stress and Sleep,indicates that______. Dr

Winkle says,"The more we worry,the less we sleep,the more we are unable to deal with stress.  If we can

find a way to get a good night's sleep," he adds. "we can often find the energy to deal with what's worrying us. "

     So,what is a good night's sleep? Research shows that the amount of sleep which people need in order

to keep healthy varies a lot. Seven hours is about the average amount,though strangely enough,sleeping

longer often gives you a headache instead of making you feel more refreshed.

     Dr Winkle believes that preparing for sleeping is important. People who work late should try to give

themselves a short break and do something restful before going to bed.  This could be watching TV or

listening to music.  Doing some exercise earlier in the day should help you to feel physically as well as

mentally tired. A bedtime drink can also help,but coffee or tea should be avoided as they contain caffeine

and will keep you awake.  " When you put the light out,"  Dr Winkle says,"concentrate on relaxing your

muscles,working slowly up from your feet,and you'll be asleep before you know it. "

   

1.  What is the best title of the passage? ( Please answer within 10 words)

        ______________________________________________________________________

2. Which sentence in the passage can be replaced by the following one?

     People shouldn't go to sleep immediately but should take a break after working late in the night.

        ______________________________________________________________________

3.  Please fill in the blank in the second paragraph with proper words or phrases to complete

      the sentence.  ( Please answer within 10 words)

     _____________________________________________________________________

4.  Someone says that the longer you sleep,the better you feel. Try to find some arguments from

     the passage against the idea.  (Please answer within 30 words)

______________________________________________________________________

5. Translate the underlined sentence in the first paragraph into Chinese.

_____________________________________________________________________

单项选择题