在直角坐标系下,三角形的三个顶点分别为A(1,2,3),B(4,5,6)和C(7,8,9),则矢量RAB的单位矢量坐标错误的是( )。
A、(3,3,3)
B、(0.577,0.577,0.577)
C、(1,1,1)
D、(0.333,0.333,0.333)
发布时间:2023-08-08 13:19:23
A、(3,3,3)
B、(0.577,0.577,0.577)
C、(1,1,1)
D、(0.333,0.333,0.333)