A.細(xì)胞數(shù)量少,纖維成分多 B.細(xì)胞數(shù)量多,細(xì)胞間質(zhì)成分少 C.細(xì)胞數(shù)量少,細(xì)胞間質(zhì)成分多 D.細(xì)胞數(shù)量與細(xì)胞間質(zhì)成分各占一半
A.腮腺 B.舌腺 C.舌下腺 D.下頜下腺
A.前列腺 B.附睪 C.陰莖 D.睪丸