We play catch _________ Li Ming's ball.[ ]
A. in
B. at
C. with
D. on
答案:C
记存模型后壁距离最后一个牙
A.远中约1/2牙冠宽
B.近中约1个牙冠宽
C.近中约1/2牙冠宽
D.中间约1/2牙冠宽
E.远中约1个牙冠宽