水库蓄水指示线即调度线在防破坏线与防弃水线之间的区域我们称为（）
A、限制出力区
B、保证出力区
C、加大出力区
D、满发出力区
参考答案：C
一系统采用8255A并行I/O接口，初始化时CPU所访问的端口地址为0CBH，并设定为方式 1输出，则A口的地址应为( )。
A．0CBH
B．OCAH
C．OCH
D．OEH
用所给单词的适当形式完成句子。
1. —When did you get __________ (marry)?
—20 years ago.
2. Some wild animals may look fierce (凶猛的). But they are __________ (harm).
3. Bungee (蹦极) jumping sounds __________ (danger), don't you think so?
4. These __________ (perform) clothes are colourful.
5. As students, we should do more _________ (mean) things, or our life will be __________ (meaning).
6. If you exercise every day, you'll soon feel much ___________ (health).
7. I think the question is answered ___________ (correct). Who can give me the right one?
