A.脾 B.肝 C.胃 D.腎
A.灰質(zhì) B.神經(jīng)核 C.神經(jīng)節(jié) D.白質(zhì)
A.脊神經(jīng)節(jié) B.神經(jīng)核 C.視網(wǎng)膜 D.纖維束