單項選擇題三級過濾中濾網(wǎng)的目數(shù)是指()的面積上有多少網(wǎng)孔數(shù),即篩網(wǎng)的網(wǎng)孔數(shù)。
A.1mm*1mm
B.1英寸*1英寸
C.1cm*1cm
D.1dm*1dm
A.1mm*1mm
B.1英寸*1英寸
C.1cm*1cm
D.1dm*1dm