硬脊膜外隙()。
A.位于硬脊膜与椎管之间
B.腔隙内有脑脊液
C.位于硬脊膜与蛛网膜之间
D.位于硬脑膜与颅骨骨膜之间
E.位于软脊膜与蛛网膜之间
参考答案:A
________ earthquake in Japan on March 11th, 2011 is ________ great shock not only to the Japanese people but also to people all over the world.
A.The; the
B.The; a
C.An; a
D.An; the
LXJ、DXJ的励磁电路各涉及到哪些网路线?为什么要求LXJ、DXJ缓放?