A.加速度
B.速度
C.位移
D.动能
ACD
宫颈癌的病因主要为()
A.早婚、早育、多产
B.包皮垢的影响
C.疱疹病毒Ⅱ型及人类 * * 瘤病毒感染
D.慢性宫颈炎及宫颈裂伤
E.以上多种因素的协同作用
They had a wonderful time ______. [ ]
A. to chat on the Internet
B. chatting on the Internet
C. to chat in the Internet
D. chatting in the Internet