中国 * * 票的特奖号码是在1000万个号码中有一个，小明任意买了一注，中特奖是[ ]
A.不可能事件
B.可能事件
C.很可能事件
D.必然事件
答案：B
— It is said that Mary's husband didn't know about the accident until last Wednesday.
— Only then _____ him about it. [ ]
A. she told
B. would she tell
C. she did tell
D. did she tell
简述影响钻探设备技术经济指标的因素有哪些方面？
