若(x+m)(x+n)=x2-6x+5,则( )
已知复数z=i1+i (i为虚数单位),则复数z在复平面上所对应的点位于( )
西亚地区跨两大洲的国家是( )
—Please say something about Zheng He.
—Oh! He is the Ming dynasty explorer of ______ all the Chinese are proud.