问题 单项选择题

合金化加入顺序为()。

A.合金化的合金元素先加,脱氧用的合金元素后加

B.脱氧用的合金元素先加,合金化的合金元素后加

C.合金化和脱氧用的合金同时加

D.都不对

答案

参考答案:B

阅读理解

阅读理解

     The Internet is a big place. Nobody has the time to look at every webpage(网页) to find something. Yahoo can help

us to find what we need.

     Two Stanford University students, David Filo and Jerry Yang started Yahoo in 1994. They started by making a list of

their favourite webpages. When their list got longer, they made a database(数据库) to keep their information. They let

everybody use it for free. Soon, thousands of people began to use their service.

     They then made a new kind of software. It could take certain information and arrange it for someone to look at. If you

search for, say, "blue whales", the engine will give you a list of webpages with those words.

     Yahoo became a public company in 1996. Filo and Yang, still young men, became rich. As their company grew, they

went on working hard. They improved their software. They also added more services, like shopping, free e-mail, in many

different countries and languages.

     Yahoo. com is famous on the Internet. And unlike most other Web companies, Yahoo earns much money in fact.

1. When Yang and Filo wrote the first Yahoo software, they ________.

A. made people pay to use it

B. were still university students

C. knew it wasn't useful

D. were high school students

2. After Yang and Filo became rich, they _________.

A. became lazy

B. worked less

C. kept working hard

D. stopped working at Yahoo

3. What kind of Yahoo service is not discussed in the passage?

A. Buying and selling stocks(股票).

B. Search engine.

C. E-mail.

D. Shopping on the Internet.

4. Which of the following is TRUE?

A. Yahoo is always a big company.

B. Yahoo is a Web company.

C. Yahoo makes people pay for their e-mail service.

D. Yahoo is losing money.

5. What does the passage suggest about most Internet companies?

A. They don't earn much money.

B. They're all famous.

C. They're just like Yahoo.

D. They're all in English.

单项选择题