【简答题】求满足下列条件的平面方程: (1)过点(1,0,2)且平行于向量a={1,-1,2}和b={2,1,0}; (2)过点(1,1,-1),(-2,-2,2)和(1,-1,2)。
【简答题】已知平面过点 (1,0,-1)且平行于向量 a=(2,1,1) 和向量 b=(1,-1, 0), 试求这平面方程
【单选题】听力原文:W: Mice is ill and she's in the hospital now. M: I'm sorry to hear that Q: Where's Alice now? (18)
【单选题】M: where is the bus stop? S:
A.
It’s beside the subway.
【单选题】--Where’s my schoolbag? --______.