题型:选择题 He ________ comb his hair at the table, even though he knows I don't like it. [ ]A. shall B. may C. will D. can 查看答案
题型:填空题 如图所示,在水平拉力F的作用下重100N的物体A,沿水平桌面做匀速直线运动,弹簧秤B的示数为10N,则拉力F的大小为______N,物体A与水平桌面的摩擦力大小为______N. 查看答案