问题标题:
【0.0045m=?um=?nm,0.25m=?um=?nm请用科学计数法,】
问题描述:
0.0045m=?um=?nm,0.25m=?um=?nm请用科学计数法,
邓翔宇回答:
0.0045m=4.5×10^3um=4.5×10^6nm,0.25m=2.5*10^5um=2.5*10^8nm
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0.0045m=?um=?nm,0.25m=?um=?nm请用科学计数法,