A.6~10X B.8~10X C.10~16X D.16~40X
A.上皮細(xì)胞層 B.前彈力層 C.實(shí)質(zhì)層 D.內(nèi)皮細(xì)胞層
A.1/4 B.1/5 C.1/6 D.1/7