A.20% B.30% C.40% D.50% E.60%
A.0.125mm B.0.25mm C.0.5mm D.0.75mm E.1mm
A.老年人牙列變松,牙齒松動(dòng) B.食管黏膜逐漸萎縮 C.消化能力下降 D.胰淀粉酶和胰蛋白質(zhì)酶分泌減少 E.肝臟實(shí)質(zhì)細(xì)胞減少、變性