A.50% B.60% C.70% D.80% E.90%
A.甲醛 B.鉛 C.汞 D.鉻 E.砷
A.透氣性不好 B.不吸汗 C.細(xì)菌易于生長繁殖 D.易引發(fā)皮炎 E.靜電感應(yīng)