下列说法正确的是（ ） A．乙醇和乙酸都存在碳氧双键 B．甲烷和乙烯都可以与氯气

关闭应用程序时,可以使用快捷键( )。
A．alt+f1　 B．alt+f2　 C．alt+f3　 D．alt+f4

阅读短文，选择正确答案。

    Chinese people are now spending more time surfing the net than watching TV, according to results of a

survey by the Chinese Academy of Social Sciences (CASS) published Thursday.

    The survey, of citizens of five Chinese cities, found that 79 percent of interviewees use the internet for

information, and 55.1 percent to read news on the internet. About 63 percent of the interviewees use e-mail. The

average times spent surfing the net and watching TV were 2.73 hours and 1.29 hours, respectively.

    Only 10.4 percent reported use the internet primarily to send and receive email; 65.9 percent read online news;

62.2 quite often play games on-line. More and more people have taken an interest in the entertainment

opportunities online. Up to 56.5 percent of interviewees quite often download music, and 53.5 percent get

entertainment messages from the internet.

    Yet the survey found that television is still the dominant mass medium. Seventy-nine percent of interviewees

choose to watch TV to get information, and another 75 percent take newspapers as important as TV.

    Five major web sites in the Chinese language, namely Sina, Sohu, Netease, Baidu and Yahoo are still ranked

top ones by web users, and those that voted for Sina as the best among them were 30.9 percent.

    Authorized statistics showed that web users in China have already exceeded 100 million, second to that of the

United States.

1. Which of the following is not true? [ ]

A. Chinese people are now spending more time surfing the net than watching TV.

B. There are more Chinese people using the internet for information compared with those reading news on the

     internet.

C. There are more people using e-mail compared with those searching information on the internet.

D. There are more people using e-mail compared with those reading news on the internet.

2. The survey shows that             . [ ]

A. Only 10.4% reported use the internet to send and receive email.

B. Less than half of the people use the internet for entertainment.

C. All of the people reported like to play games on-line.

D. Most of the people reported read online news.

3. Which will you choose if you want to chat with your friends on the internet? [ ]

A. TV

B. Sina

C. telephone

D. QQ

4. The underlined word "exceeded" means             . [ ]

A. increased to

B. increased by

C. risen

D. decreased

5. —Sina, Sohu, Netease, Baidu and Yahoo aren't Five major web sites in the Chinese language, are they?

    —              .[ ]

A. Yes, they are

B. No, they aren't

C. Yes, they aren't

D. No, they didn't

现况调查中偏倚的防止方法主要是

A．坚持随机化抽样，减少漏查，统一检测标准，校准仪器，加强调查的监督和质控

B．坚持多个医院选择病例，减少漏查，统一检测标准，加强调查的监督和质控

C．坚持随机化抽样，减少不依从，暴露测量标准应统一，加强调查的监督和质控

D．坚持随机化抽样，尽量用新发病例，暴露测量标准应统一，加强调查的监督和质控

E．坚持随机化分组，减少不依从，统一检测标准，加强调查的监督和质控

病人男性，65岁，医院诊断为肾病综合征，护士对病人给予饮食指导不妥的是（）

A.蛋白质摄入量为正常入量，每日每千克体重1.0g

B.尽量摄入动物蛋白

C.热量摄入为每日每千克体重不少于126～147kJ

D.高脂饮食

E.水肿时盐摄入<3g/d

特应性皮炎发病中，吸入性变应原包括（）

A.动物毛

B.花粉

C.真菌

D.屋尘

E.以上都是