问题 单项选择题

随机存取存储器(RAM)的最大特点是______。

A.存储量极大,属于海量存储器

B.存储在其中的信息可以永久保存

C.一旦断电,存储在其上的信息将全部消失,且无法恢复

D.计算机中,只用来存储数据的

答案

参考答案:C

解析: RAM是计算机内存储器中的一部分。计算机内存储器有ROM和RAM组成。ROM是只读存储器的英文简称,特点是它的信息是可以永久保存的。RAM是可读可写存储器的英文简称,特点是一旦断电它的信息将全部消失。

阅读理解

阅读理解。

     You have been working hard to learn English. Do you know American kids are trying to learn Chinese?

  More than 60,000 American students now study Chinese.

     "Because of China's fast development, Chinese has become more useful, and more and more

 Americans begin to learn it," said Scott McGinnis, a Washington language expert (专家).

     For example, in 1999, only three schools in Chicago had Chinese lessons. This year more than 30

 schools there have Chinese during school days. Last year China gave them 3,000 textbooks because they

  had done a good job.

     Although Chinese is becoming more and more popular, it is one of the most difficult languages to learn.

  Usually, an English speaker takes about 1,320 hours to become good at Chinese. He needs only 480

 hours for French, Spanish or Italian.

1. According to Scott McGinnis, more and more Americans begin to learn Chinese ______ .    

    A. because of China's fast development  

    B. because of China's interesting culture  

    C. because they have more free time

    D. because Chinese is easy to learn    

2. This year, ______ schools in Chicago give students Chinese lessons.

    A. only three         

    B. thirteen

    C. over thirty      

    D. less than thirty      

3. The students at those schools in Chicago take Chinese lessons ______ .

    A. after school

    B. at weekends    

    C. on school nights    

    D. on school days

4. Last year China gave ______  textbooks to those schools in Chicago.

    A. thirty      

    B. three hundred

    C. three thousand      

    D. thirty thousand

5. From the last two sentences we know that ______ .

    A. Chinese is easier to learn than French, Spanish or Italian

    B. Chinese is more difficult to learn than French, Spanish or Italian  

    C. English speakers like to learn French, Spanish or Italian more than Chinese

    D. English speakers like to learn Chinese more than French, Spanish or Italian

多项选择题