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(1)Frog in the Well井底之蛙There is a frog trying to jump out of a 60-metre well. Each time it can jump 2 metres high. So, how many times does it have to jump in order to get out of the well?有一只青蛙在六十米的井底下往上跳,它一次能跳二米高。它要跳多少次才能跳出井口呢?