— ____make she different from the othe rstudents?

—Honesty,Ithink.

A．How is it that

B．How is that

C．What is it that

D．What it is that

在水平地面上用60N的水平拉力拉重100N的木箱，使木箱沿拉力方向前进5m，拉力所做的功等于___________J，重力所做的功等于__________J。