If there are two points and two straight lines are perpendicular to the plane, then the two straight lines are parallel and contradictory to different planes.

9. The tangent point is (m, lnm)

y'= 1/x？ K= 1/m=(lnm+ 1)/m, the solution is m= 1, k =1,and the tangent is y=x- 1.

Use x &；; # 178; =2y simultaneous, △=0, and the solution is p=2.

10、B