A.0.5% B.3-5% C.10-20% D.1%
A.經(jīng)常到野外玩 B.經(jīng)常洗澡 C.對(duì)幼兒進(jìn)行教育 D.搞好環(huán)境衛(wèi)生
A.吃一些糧食 B.只吃肉 C.不吃 D.只吃雞蛋