PLC程序中END指令的用途是()。
A.物程序结束,停止运行;
B.指令扫描到端点,将进行新扫描;
C.指令扫描到端点,有故障;
D.a、b、c都是。
参考答案:B
用所给的单词的适当形式填空。
1. It's fun _____ (play) games.
2. I am happy _____ (get) your presents.
3. When will you _____ (arrive) in Beijing
4. Do you know the _____ (different) between schools in America and in China?
5. We _____ (play) football tomorrow afternoon.
根据《城镇土地定级规程》的规定,城镇土地定级分为()。
A.综合定级
B.分类定级
C.单项定级
D.多项定级
E.多用途定级