直(zhi)接測(ce)數法是(shi)憑(ping)借照布(bu)鏡(jing)(jing)或織(zhi)物(wu)密度(du)(du)分(fen)析鏡(jing)(jing)來完成(cheng)。織(zhi)物(wu)密度(du)(du)分(fen)析鏡(jing)(jing)的刻度(du)(du)尺長度(du)(du)為5cm,在分(fen)析鏡(jing)(jing)頭下(xia)面(mian),一塊(kuai)長條形玻璃片上刻有一條紅線, 不(bu)用(yong)洗(xi)衣粉(fen)(fen)清(qing)洗(xi):洗(xi)衣粉(fen)(fen)中(zhong)的酶在陽(yang)光下(xia)回產(chan)生(sheng)化學反應(ying),生(sheng)成(cheng)黃色的物(wu)質,會使鞋子變黃。所以不(bu)建議使用(yong)洗(xi)衣粉(fen)(fen)清(qing)洗(xi)鞋子。巧用(yong)白色紙(zhi)(zhi)巾:將洗(xi)好的鞋子用(yong)白紙(zhi)(zhi)的衛生(sheng)紙(zhi)(zhi)全(quan)面(mian)包裹起...