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问题 单项选择题

CPU每执行一条( )，就完成一个最基本的算术逻辑运算或数据的存取操作。

A．命令行

B．指令

C．程序

D．语句

答案

参考答案：B

解析：[考点] CPU的主要内容 CPU每执行一条指令，就完成一个最基本的算术逻辑运算或数据的存取操作。

阅读理解

阅读理解        

        Look! This is a picture of our classroom.  There are fifty desks and chairs in it.  They are for

students.  On the desks are our books.  There is also a big desk in the classroom.  It’s for our teachers.  Under the teacher’s desk,  there are two basketballs and a football.  We can play basketball and

football after class.  What other things can you see?  Yes,  there are two maps on the wall,  a map of

China and a map of the world.  Our classroom is very nice.  I like it very much.

根据短文内容，回答问题

1. Is this a picture of our school?  

                                                                          

2. How many students are there in our class?

                                                                          

3. Is our teacher’s desk big?

                                                                          

4. What are under the teacher’s desk?

                                                                          

5. What are on the wall?

                                                                          

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单项选择题

制作水泥胶砂试件时，使用的砂是（）。

A．普通河砂

B．中国ISO标准砂

C．海砂

D．山砂
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