网络优化流程中基站簇优化的目的是分区域定位、解决网络中存在的问题

     You may feel interested in students in other countries.Do they have so much homework? What do

they do in their free time? People did a survey in China,Japan,South Korea(韩国)and the US last year.

This is the result.

     Who studies the hardest?

     Chinese students spend the most time in studying.About half of Chinese students spend more than

two hours on their homework every day.

     Who sleeps most often in class?Japanese students fail asleep(睡着)in class more often，About 45％

of them sometimes doze off in class.It's 32% in South Korea,21%in the US and 5%in China.

     Who is the most distracted(分心的)?

     American students are the most active in class,but also the most distracted.64.2%of them chat with

friends in class. 46.9 of them eat something in class, and 38.9 of them send e-mails or read other books

in class.

     What do they do after school?

     In their free time, most Chinese students study or surf the Internet. Most American students hang out

with their friends. Most Japanese students do exercise, .Most South Korean students watch TV.

1.About _________of Chinese students spend more than 2 hours doing their homework every day.

A. 50%

B. 45%

C. 64.2%

D. 38.9%

2.According to the survey. _________ students sleep in class most often.

A. Chinese

B. Japanese

C. American

D. South Korea

3.The underlined phrase "doze off" mean _________in Chinese.

A. 听音乐

B. 玩游戏

C. 看小说

D. 打瞌睡

4.46.9％of American students_________ in their free time.

A. chat with friends

B. play games

C. eat something

D. send e-mails

5.Most American students, _________in their free time.

A. surf the Internet

B. hang out with friends

C. do sports

D. watch TV

吸烟者所患肺癌最常见的是（）

A.燕麦细胞癌

B.鳞状细胞癌

C.腺癌

D.肺泡细胞癌

E.支气管腺瘤

在辅导工作中，保荐机构应当制作工作底稿，出具阶段辅导工作报告，分别向中国证监会的派出机构报送。（）

患者女，66岁，既往高血压、糖尿病、高脂血症病史数年，发作性左前胸闷痛2年，近日发作频繁，每次时间在20min以上。查体：心率90次/min，血压80/50mmHg，颈静脉无充盈，双肺大量细小水泡音，心前区未闻及杂音，腹部查体未见异常，双下肢无水肿。

目前，最有价值的检查为（）

A.肌钙蛋白

B.肌酸激酶

C.C-反应蛋白

D.D-二聚体

E.天门冬氨酸氨基转移酶

F.血常规

机舱内臭氧含量可达到或超过多少时，会对人体造成危害（）

A、百万分之一

B、百万分之二

C、百万分之四