题目

19．From this year’s poor results, one can see ______ many changes have been made in the football team and that, sadly, it is no longer ______ it once was. A．that; what B．what; that C．what; when      D．that; where 答案：A用手拍桌面，手会感到疼，这说明物体间力的作用是___________的．手痛是因为受到力的作用，这个力的施力物体是___________．