若am=2，an=3，则am+n=( )，a3m﹣2n=( )

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问题填空题

若a^m=2，aⁿ=3，则a^m+n=( )，a^3m﹣2n=( )

答案

6；

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—I can't go with you today. There will be a test tomorrow.

—_____. Maybe next time. [ ]

A. It doesn't matter

B. My pleasure

C. I don't think so

D. Sorry to hear that

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什么是人口老龄化？