已知m,n为两条不同的直线,a,b为两个不同的平面,则下面命题正确的是a.m经过a,n经过a,m//b,n//n=>a//bb.a//b,m经过a,n经过b=>m//nc.m垂直a,m垂直n,=>n//ad.m//n,n垂直a=>m垂直a
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![已知m,n为两条不同的直线,a,b为两个不同的平面,则下面命题正确的是a.m经过a,n经过a,m//b,n//n=>a//bb.a//b,m经过a,n经过b=>m//nc.m垂直a,m垂直n,=>n//ad.m//n,n垂直a=>m垂直a](/uploads/image/z/7641336-48-6.jpg?t=%E5%B7%B2%E7%9F%A5m%2Cn%E4%B8%BA%E4%B8%A4%E6%9D%A1%E4%B8%8D%E5%90%8C%E7%9A%84%E7%9B%B4%E7%BA%BF%2Ca%2Cb%E4%B8%BA%E4%B8%A4%E4%B8%AA%E4%B8%8D%E5%90%8C%E7%9A%84%E5%B9%B3%E9%9D%A2%2C%E5%88%99%E4%B8%8B%E9%9D%A2%E5%91%BD%E9%A2%98%E6%AD%A3%E7%A1%AE%E7%9A%84%E6%98%AFa.m%E7%BB%8F%E8%BF%87a%2Cn%E7%BB%8F%E8%BF%87a%2Cm%2F%2Fb%2Cn%2F%2Fn%3D%3Ea%2F%2Fbb.a%2F%2Fb%2Cm%E7%BB%8F%E8%BF%87a%2Cn%E7%BB%8F%E8%BF%87b%3D%3Em%2F%2Fnc.m%E5%9E%82%E7%9B%B4a%2Cm%E5%9E%82%E7%9B%B4n%2C%3D%3En%2F%2Fad.m%2F%2Fn%2Cn%E5%9E%82%E7%9B%B4a%3D%3Em%E5%9E%82%E7%9B%B4a)
已知m,n为两条不同的直线,a,b为两个不同的平面,则下面命题正确的是a.m经过a,n经过a,m//b,n//n=>a//bb.a//b,m经过a,n经过b=>m//nc.m垂直a,m垂直n,=>n//ad.m//n,n垂直a=>m垂直a
已知m,n为两条不同的直线,a,b为两个不同的平面,则下面命题正确的是
a.m经过a,n经过a,m//b,n//n=>a//b
b.a//b,m经过a,n经过b=>m//n
c.m垂直a,m垂直n,=>n//a
d.m//n,n垂直a=>m垂直a
已知m,n为两条不同的直线,a,b为两个不同的平面,则下面命题正确的是a.m经过a,n经过a,m//b,n//n=>a//bb.a//b,m经过a,n经过b=>m//nc.m垂直a,m垂直n,=>n//ad.m//n,n垂直a=>m垂直a
答案:d