下列对“艰难困苦，玉汝于成”“失败是成功之母”的理解正确的是（） A．挫折孕育着

阅读短文，选择正确答案。

    The internet is becoming important in our life. How much do you know about it? What is the internet?

    The internet is a large, worldwide collection of computer networks, A network is a small group of computers

put together. The Internet is many different networks from all over the world. These networks are called the

Internet. Once you have learned to use the Internet, you can have a lot of interest on the World Wide Web.

    What is the World Wide Web?

    The World Wide Wed has been the most popular development of the internet: The Web is like a big electronic

book with millions of pages. These pages are called homepages.

    You can find information about almost anything in the world on these pages. For example, you can use the

Internet instead of a library to find information for your homework. You can also find information about your

favorite sport or film star, talk to your friends or even do some shopping on the pages. Most pages have words,

pictures and even sound or music.

    What is e-mail?

    Electronic mail (E-mail) is a way of sending messages to other people. It's much quicker and cheaper than

sending a letter.

    If you want to use e-mail, you must have an e-mail address. This address must have letters and dots and an

"@" (meaning "at"). This is what an address looks like: e-mail@star.net. Write a message, type in the person's

e-mail address, then send the message across the Internet. People don't need to use stamps, envelopes or go to

the post office since the invention of the internet. Quick, easy and interesting, that's the Internet!

1. The Internet is ________. [ ]

A. a big computer

B. a small group of computers

C. lots of computer networks

D. the world Wide Web

2. The World Wide Web is like _______. [ ]

A. an electronic book

B. homepages

C. an electronic page

D. air interesting picture

3. What does "talk to your friends on the pages" mean? It means ________. [ ]

A. you can talk to your friends face to face

B. you can type your words in the computer and then end them to your friends across the internet.

C. you talk to our friends through the same computer.

D. you go to your friends houses to talk to them

4. People like to use e-mail to send messages to their friends and family because _______. [ ]

A. they don't have to pay any money

B. it's faster and cheaper

C. they don't need to have stamps, envelopes or addresses

D. sending a mail is interesting

5. The "e" in e-mail means ________. [ ]

A. easy

B. electrical

C. electronic

D. enjoyable

与选择性冠状动脉造影技术无关的是（）

A.选用Judkins导管

B.股动脉或桡动脉穿刺插管

C.在主动脉窦壁寻找左冠状动脉

D.在升主动脉下段寻找右冠状动脉

E.常规选用50%～60%离子型或非离子型对比剂

2011年3·15特别行动，同时曝光了“瘦肉精”事件，同时曝光了“瘦肉精”喂出来的“健美猪”流入河南济源双汇食品有限公司的事实。瘦肉精学名盐酸克伦特罗，食用后会导致人有恶心、头晕、四肢无力、手颤等中毒症出现。针对近年来相继发生的“毒奶粉”、“瘦肉精”、“染色馒头”等食品安全事件，我国政府高度重视，并出台了相关法律，各级公安机关依法履行职责，严厉打击了食品非法添加犯罪行为。

（1）材料中企业的行为侵犯了消费者的哪些权利？

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（2）在食品安全问题上，怎样才能成为一个合格的消费者？

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简述“古训”不能认为是“训诂”出处的原因。

企业的资金成本是指（）

A.资金占用费

B.资金筹集费

C.取得和使用资金支付的各种费用

D.资金占用费和资金筹集费之和

E.利息、股利、租赁费