a4纸尺寸示意
a4纸在屏幕上的像素尺寸
a4纸的长宽比是多少?
what is the paper size of a0 a1 a2 a3 a4 a5 a6 a7 a8
a4纸是指由国际标准化组织的iso 216定义的,iso 216定义了a,b,c三组
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