Dandy-Walker畸形系下面哪种原因所引起()
A.室间孔阻塞
B.小脑扁桃体下疝畸形
C.第四脑室正中孔或侧孔闭锁
D.中脑导水管闭锁
E.颅颈交界区异常
参考答案:C
It’s important for the figures regularly.
A.to be updated
B.to have been updated
C.to update
D.to have uodated
A型胃炎, 主要由自身免疫反应引起,可导致恶性贫血