计算(3*10的-5次幂)²/(3*10的-1次幂)²=
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计算(3*10的-5次幂)²/(3*10的-1次幂)²=计算(3*10的-5次幂)²/(3*10的-1次幂)²=计算(3*10的-5次幂)²/(3*1
计算(3*10的-5次幂)²/(3*10的-1次幂)²=
计算(3*10的-5次幂)²/(3*10的-1次幂)²=
计算(3*10的-5次幂)²/(3*10的-1次幂)²=
(3*10的-5次幂)²/(3*10的-1次幂)²
=9x10^(-10)/9x10^(-2)
=10^(-10+2)
=10^(-8)
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