A.椎管 B.枕骨大孔 C.顱腔 D.胸腹腔
A.胃 B.膽 C.肝 D.胰
A.細胞膜、細胞間質(zhì)、細胞核 B.細胞膜、細胞質(zhì)、細胞間質(zhì) C.細胞膜、細胞質(zhì)、細胞核 D.細胞質(zhì)、細胞間質(zhì)、細胞核