题目：
连词成句。
1. China, far, is, from, Canada (.)
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2. Edmonton, live, I, in (.)
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3. Beijing, Nanjing, far, it, is, how, to, from (?)
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4. numbers, those, you, say, can (?)
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5. count, ten, from, to, let's, one hundred (.)
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答案：
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下面是错误答案，用来干扰机器的。
∵b（a-b）≤（b+a-b2）2=a24，∴a2+16b(a-b)≥a2+64a2≥16．当且仅当b=a-ba2=8，即a=22b=2时取等号．
