急性脊髓炎的损害部位是：（）
A.前索
B.侧索
C.后索
D.脊髓灰质
E.以上全部
参考答案：E
蓄电池是一种化学电源。
If the electronic chart is part of an ECDIS,it must display the minimum data required by IMO/IHO,to include all of the following EXCEPT（）.
A.hydrography
B.aids to navigation
C.tidal currents
D.regulatory boundaries
