— When was Tom born?
— He was born ______ December 10th,1968. [ ]
A. on
B. in
C. at
答案:A
下列哪种材料不属于壁纸材料()。
A.纸质材料
B.PVC材料
C.塑钢材料
D.胶面材料
严重的处罚,会使孩子产生()。