问题 判断题

计算机病毒具有潜伏性,仅在某些特定的日子才发作。( )

答案

参考答案:

解析: 有些计算机病毒进入系统后并不立即发作,而是长期隐藏在系统中,等待满足特定的触发条件时才发作。这些触发条件是病毒设计者预先设计的,不仅包括日期或时间,还可能是文件运行的次数等。这些病毒就像定时炸弹一样,平时隐藏得很好,一旦触发条件出现,便立即发作,危害计算机系统。

阅读理解

阅读理解。

     My name is Mariko. I’m from Tokyo. I can speak a little English. But I can't speak Chinese. I usually

get up at 6 o'clock and go to school at 7:30 in the morning. I think art is interesting. I don't like science.

I think it is boring. I want to come to China and Canada very much. I think they are very interesting.

My name is Mario. I am from Paris. I am 12 years old. I go to school at seven fifty and I go home at

four twenty. I have lunch at school. I usually eat fish, French fries, potatoes and carrots for lunch. My

favorite subject is music, because it’s fun. I want to join a music club. I don’t like P.E.. I usually do my

homework at 5 o’clock and I go to bed at 10 o'clock.I am Boris. I am from Canada. I like science and

art. I want to join the art club. Swimming club is not interesting. I don’t like math. I think it is boring. I

get up at six thirty and then I run on the playground (操场). My good friend is Sam. He doesn't know

Chinese. He doesn't like Chinese food. He wants to join our Chinese club.

1. Mario likes        best. 

 A. music          

B. art            

C. math          

D. science

2.        goes to school at 7:30.

A. Mario          

B. Mariko          

C. Sam            

D. Boris

3. Mariko doesn’t like science because it is  ___.  

A. interesting        

B. relaxing        

C. boring          

D. fun

4.       is from Japan.    

A. Mario            

B. Mariko      

C. Sam            

D. Boris

5. Boris wants to join       .  

A. Swimming club.    

B. Music club.    

C. Art club.    

D. Chinese club.

单项选择题