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- 精华
- 0
- 积分
- 46
- 经验
- 46 点
- 威望
- 0 点
- 金钱
- 177 ￥
- 魅力
- 76
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(46) PS:Three interger number code choosing from 0-9.0/1 can not be on the first place,
0/1 show on the second place,and the second or third place can not be 0/0.
How many possibilities? A:144. B:152 C:162
[思路]first place 有8种，if second place is 0, third place 有9种，if second place is1,
third place 有10种。共8*17
[确认]B
___________WHO CAN HELP ME TO SLOVE IT?????_________________
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