直接(jie)測數(shu)法是憑借照布(bu)鏡(jing)(jing)或織(zhi)物(wu)密度(du)分(fen)析(xi)鏡(jing)(jing)來完(wan)成(cheng)(cheng)。織(zhi)物(wu)密度(du)分(fen)析(xi)鏡(jing)(jing)的刻度(du)尺長度(du)為5cm,在(zai)分(fen)析(xi)鏡(jing)(jing)頭下(xia)面,一塊長條(tiao)形(xing)玻(bo)璃(li)片上刻有一條(tiao)紅線, 不(bu)用洗(xi)衣(yi)粉清洗(xi):洗(xi)衣(yi)粉中的酶在(zai)陽光下(xia)回產生(sheng)(sheng)(sheng)化學反應,生(sheng)(sheng)(sheng)成(cheng)(cheng)黃(huang)(huang)色(se)的物(wu)質,會(hui)使(shi)(shi)鞋子變黃(huang)(huang)。所以不(bu)建議使(shi)(shi)用洗(xi)衣(yi)粉清洗(xi)鞋子。巧用白色(se)紙(zhi)巾:將(jiang)洗(xi)好(hao)的鞋子用白紙(zhi)的衛(wei)生(sheng)(sheng)(sheng)紙(zhi)全面包裹(guo)起...