问题 单项选择题

为了便于实现多级中断,使用____________来保护断点和现场最有效。

A.ROM

B.中断向量表

C.通用寄存器

D.堆栈

答案

参考答案:D

解析:解析:堆栈都是一种数据项按序排列的数据结构,只能在一端(称为栈顶(top))对数据项进行插入和删除。为了便于实现多级中断,使用堆栈来保护断点和现场最有效。

阅读理解

阅读理解。

     It is the first day of October today. It is my grandmother's birthday. Father, mother, sister and  I go to

 see her.

     First we go to a supermarket to buy some presents for my grandmother. My father buys a big cake (蛋

 糕). My mother buys a red sweater. My sister buys a green T-shirt.I buy a black hat for my grandmother.

 We go to my grandmother's home in my father's car. We get there at around nine o'clock. My

 grandmother is very happy to see us. We give these presents to her and say to her, "Happy birthday to

 you!,'My grandmother is very glad (高兴的).Then my sister and I sit down and play games with my

 grandmother. After dinner we say goodbye to her and go back (回) home. We are very happy today.

1.  My grandmother's birthday is _____.

    A. October thirty-first    

    B. October first

    C. October second    

    D. October third

2. My mother buys-for my grandmother.

    A.  a black hat    

    B.  a big cake    

    C.  a blue sweater    

    D.  a red sweater

3. We go _____ to buy some presents.

    A.  a clothes store    

    B.  a supermarket    

    C.  afruit shop    

    D.  a book store

4.  My grandmother is very _____ to see us.

    A. old    

    B. unhappy (不高兴)

    C. happy    

    D. boring

5. My sister and I play games with my _____.

    A. mother    

    B. uncle    

    C. grandmother    

    D. father

单项选择题 A1/A2型题