A.細胞數(shù)量少,纖維成分多 B.細胞數(shù)量多,細胞間質(zhì)成分少 C.細胞數(shù)量少,細胞間質(zhì)成分多 D.細胞數(shù)量與細胞間質(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