以下是《中国药品通用名称》英文缩写的是A．CDAN B．CADN C．CMAN D．

When I was a girl of 10, I joined the school cross-country team and practiced twice a week, on the 1,8-km course I'd never really run before and I thought the course would be easy. It was a real shock I ran out of breathe(喘气)within the first few minutes. I never realized how tiring running could be but I didn’t t think about give up.

Over time,I did get a little bit faster. However, I was really slow. In races, I would finish close to last. I'd always have to stop more than once, especially in the longer races, which were 2. 5 to 2. 8 km. After every race, I'd go home and cry. But 1 still didn't stop running, holding onto that picture of crossing the finishingline and finally doing well.  

Then one of my friends joined the team, too. She could run easily and even came in the 18^th in a big race! I felt so slow and my confidence(自信) was lower than ever. I became so nervous when I thought of the races that I wanted to give up badly.

Still. I refund to. Finally. 1 realized that the reason I was to nervous was that I was always worried that I wasn't ready for them. So a few weeks before the next 2. 8-km race. I practiced running almost 3 km every day. which helped me improve my pace(步伐).

When the time came for the big race, all that practicing really paid off. I stopped only once and my pace was so much better.

I realized that I’d finally gotten happiness with running. But the funny thing was. It didn't come from doing better, Instead, it came from the fact that I hid tried harder and never given up.

小题1: Before she took the 1.8-km course, the writer________.

A．knew a lot about it

B．wanted to be a great runner

C．practiced running every day

D．never thought running so tired小题2:The writer was nervous about the race because she_______.

A．had to stop to drink water

B．was worried she wasn’t ready

C．run slower than anyone else

D．could find no coach to help her小题3:The underlined phrase "paid off" probably mean “______”.

A．brought good results

B．coat a lot

C．saved much time

D．came to fail小题4:It can be inferred(推断) from the passage that the writer______.

A．got angry with her friend

B．wasn't pleased with herself

C．was a person with a strong mind

D．had no Interest In running

从一个呈正态分布的总体中随机抽样，X≠μ，该差别被称为（）。

A.系统误差

B.个体误差

C.过失误差

D.抽样误差

E.测量误差

家用IAD的供电方式采用（）。

右图为我国东南沿海某区域发展规划图，根据辖区内的自然条件和经济发展情况，将其划分为：甲—现代农业和生态旅游圈、乙—先进制造业产业圈、丙—都市生活圈。据图完成问题。

小题1:根据图中信息，判断下列说法正确的是

A．交通最便捷的是甲区

B．最容易发生洪涝灾害的是乙区

C．河流水质最好的是丙区

D．建港口最好选择 ② 河口小题2:甲区规划为限制开发的生态旅游示范区，其主要原因是

A．区内亚热带植被覆盖条件好

B．区内旅游开发趋于饱和

C．防止区域生态环境遭受破坏

D．产业结构调整的需要

在IP数据报中，如果报头长度域的数值为5，那么该报头的长度为______个8位组。

A．5

B．10

C．15

D．20