问题 单项选择题

下列选项中属于网络管理协议的是()。

A.DES

B.UNIX

C.SNMP

D.RSA

答案

参考答案:C

解析:存储器的读写操作都是以字节为单位的,也就是说,每次的读写操作都是读出或者写入若干个字节。但是,这并不是说“存储器的读、写操作一次读出或写入一个字节”。存储器执行一次完整的读写操作,读出或者写入一个字(两个字节)。

问答题 简答题
阅读理解

阅读理解。

      Many Chinese students who have learnt English for more than ten years are still unable to speak English

very well when they meet a foreigner. They seem to have mastered the basic language structure (结构), but

a conversation in English will make them feel uneasy. They are afraid that other people might find out their

mistakes.

      It's uncommon that many students who are bad speakers of English can write English perfectly. This

proves that they are unable to organize their idea in English. The center of the problem is that they lack

practice and confidence (自信).

      Why should you be afraid? Do you fear those foreigners with whom you are speaking? Don't be shy,

they will not laugh at you just for a little mistake you make. The best way to get rid of trouble is to learn to

speak by speaking more. I am sure that constant practice will help you succeed.

1. What's the best topic for the passage? [ ]

A. How to Speak to Foreigners

B. How to Study English Well

C. How to Organize the Idea in English

D. Practise Speaking English All the Time

2. Many Chinese students can write English very well, but they cannot speak English fluently because _____.[ ]

A. they seldom meet foreigners

B. they seldom practise speaking English

C. they had no chance to speak English

D. they think it's enough to master the basic language structure only

3. So many Chinese students are afraid speak to foreigners because _____.[ ]

A. they are afraid they can't understand foreigners

B. they don't think their English is poor

C. they worry about making mistakes in their speaking

D. they didn't tike speaking to foreigners