直线y=kx与圆x2+y2-4x+3=0有两个交点
(1)√3/3
heteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.
Themorewelookedatthepicture,________.
设,其中为任意常数，则下列向量组线性相关的为()
Many_______willbeopenedupinthefutureforthosewithauniversityeducation．
