A.30%~35% B.35%~40% C.40%~45% D.45%~50% E.>60﹪
A.毛細(xì)血管,毛細(xì)血管前括約肌,毛細(xì)血管后括約肌 B.微動(dòng)脈,微靜脈 C.微動(dòng)脈,微動(dòng)靜脈短路 D.微靜脈,微動(dòng)靜脈短路,毛細(xì)血管 E.微動(dòng)脈,微靜脈,毛細(xì)血管
A.25% B.30% C.45% D.50% E.60%