|1-3|=-(1-3)=3-1.
故答案为:3-1.
如果要为控件设置焦点,则该控件的 【10】 和Enabled属性值为真。
改正画线处的错误。
1. I have three new teacher. 改为: ____________________
2. Who does your teacher? 改为: ____________________
3. What do you have at Monday? 改为: ____________________
4. John like Mondays very much. 改为: ____________________