![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
How__areyou-----I’m160cm__()
A.old older
B.tall taller
C.tall tall
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
C、tall tall
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.old older
B.tall taller
C.tall tall
C、tall tall
A.m1=m2, =
B.m1=m2, = , β1=β2
C.m1=m2, = , β1=-β2
D.m1=m2, =- , β1=β2
在直角坐标系中,给定点M1(1,0,3)和M2(0,2,5),直线l:,设M1',M2'各为M1,M2在l上的垂足,求|M1'M2'|以及M1',M2'的坐标.
A.M1=M2=M0
B.M1=M2=2M0
C.M1=M2=1/2M0
D.M1+M2=2M0