题目25单选:(4分)-|||-曲线 L: =dfrac {y-1)(10)=dfrac (z-1)(0)-|||-B. dfrac (x-1)(10)=dfrac (y-1)(10)=dfrac (z-1)(0)-|||-C.-|||- ) x+y-2=0 =+1=0 .题目解答答案
