问题 单项选择题

下面是关于计算机总线的叙述:  Ⅰ.总线的带宽是指总线的最高数据传输速率  Ⅱ.总线的位宽是指总线能同时传送的数据位数  Ⅲ.总线的工作频率是指用于协调总线操作的时钟信号的频率  Ⅳ.总线采用突发传送方式能提高总线数据传输的效率  上述叙述中,正确的是

A.仅Ⅰ

B.仅Ⅰ和Ⅱ

C.仅Ⅰ、Ⅱ和Ⅲ

D.全部

答案

参考答案:D

阅读理解

阅读下面短文,按要求完成相关任务。

                                                Four ways to have a good school-life

    Your schooldays should be some of the best and happiest days of your life. How can you get the most

from them, and make sure you do not waste this excellent chance to learn?

     Be active at school

     Don't say things are difficult or boring. Be interested in school-life and your school subjects. Join lots

of activities. ①(hands, quickly, your, class, in, up, put). Go around the school with a big smile. If you

are not working, you are wasting your time at school. Teachers can not make everything enjoyable.

     Keep fit

     If you donot eat a good breakfast, you will be thinking about food in class. If you go to bed late and do

not have enough sleep, you will be sleepy in class. ②Play enough sports every day in order to keep your

body strong.

     Face the problem

     Do not say you will do things tomorrow. If you get behind the class, it is very difficult to get back in

front. ③You can not finish the race if you rest all the time. Everyone fails some exams, loses some

matches and has bad days. Don't let small problems seem very big and important. Don't forget to ask for

help. You are young, no one thinks you must do everything quite well!

     ④                 

     Don't waste time lying in bed on Saturday or Sunday morning. Go and play a sport, get together with

friends in the park to relax, learn the piano, or help someone with problems. If you don't want to go out,

there are also a lot of things to do. You may read a book, practise English or help Mother with housework.

     Follow our advice, and have a happy school-life!

1. Having a good breakfast and having enough sleep can keep you                    .

2. 请把文中①处括号内的词组成一个句子。

                                                                                                                    

3. 请把文中②处斜体部分改为含有“so that”的句子,使之与原句意思相同。

                                                                                                                    

4. 请把文中③处划线部分的句子译成汉语。

                                                                                                                    

5. 请在④处给出一个小标题,使之能概括出下面一段内容的大意。                  .

单项选择题