A.10?11對(duì)B.13?14對(duì)C.16?17對(duì)D.20?21對(duì)E.21?22對(duì)
A.硬脊膜B.蛛網(wǎng)膜C.軟脊膜D.硬膜外腔中的靜脈叢E.蛛網(wǎng)膜下腔