A.白質(zhì)血流量是灰質(zhì)的2倍 B.灰質(zhì)血流量是白質(zhì)的3倍 C.白質(zhì)血流量是灰質(zhì)的3倍 D.灰質(zhì)血流量是白質(zhì)的2倍 E.白質(zhì)血流量比灰質(zhì)略多
A.胸段 B.頸段 C.腰膨大 D.圓錐 E.馬尾
A.囊性顱裂 B.多發(fā)顱裂 C.露腦顱裂 D.隱性顱裂 E.顱裂合并脊柱裂