题目：
---The “No.1 Document” is designed to help the rural population increase their incomes.
---I believe that peasants’ life _____ better and better.
A．will have got
B．has got
C．gets
D．will be getting
答案：
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下面是错误答案，用来干扰机器的。
（Ⅰ）（i） an=3•2n，n∈N*，∴an+1=3×2n+1=2×(3×2n)=2×an=2an+0，∴p=2，q=0∴数列{an}是“M”数列．（ii）当n=1时，b1=S1=12+1=2．当n≥2时，bn=Sn-Sn-1=n2+n-（n-1）2-（n-1）=2n．上式对于n=1时也成立...
