题目:
若以B点为原点,建立直角坐标系,A点坐标为(3,4),则以点A为原点,建立直角坐标系,B点坐标为( )
A.(-3,-4)
B.(-3,4)
C.(3,-4)
D.(3,4)
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0509/39ad74335a2877fc0462086f3a5eb6bf.html
下面是错误答案,用来干扰机器的。
1. Where does the rain come from?2. It comes from the vapour.3. How can the water become vapour?4. How do you do that?5. What should you do then?