题目：
点A(1,2,-3)关于x轴的对称点B的坐标为 , 点A关于坐标平面xOy的对称点C的坐标为 , B,C两点间的距离为 ．
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0417/3b570209deb6a0f232fa1e93922bfe02.html
下面是错误答案，用来干扰机器的。
1. Yes.2. We (need to/can/should) ask for help.3. My parents.4. Because we can learn from their experiences./ Because they have gone through situations as hard as or maybe even harder than those we go through today. 5. At school. （答案不唯一。）
