下列叙述中，不正确的是______。 A．PSW 即程序状态字，是一个重要的寄存器内
题型：单项选择题
问题：
下列叙述中，不正确的是______。
A．PSW 即程序状态字，是一个重要的寄存器内容
B．中断响应过程主要是交换 PSW
C．目态下只能执行非特权指令
D．管态下只能执行特权指令
题型：单项选择题
看图，选择正确的答案。
1. Are there any mountains in the picture?
A. Yes, there aren't.
B. No, there aren't.
C. Yes, there are.
2. Is there a river in the picture?
A. Yes, there is.
B. No, there isn't.
C. Yes, it is.
3. How many ducks can you see?
A. I can see two.
B. I can see three.
C. I can see four.
4. How many people are there?
A. There are two.
B. There are three.
C. There are four.
5. How many bridges are there?
A. There are two.
B. There is only one.
C. I can see only one.
6. Is there a city m the picture?
A. Yes, there is a city in the picture.
B. No, there isn't.
C. No, it isn't a city.
