脑脊液的主要形成部位是
A．硬脑膜
B．中脑水管
C．软脑膜
D．脑室脉络丛
E．蛛网膜下腔
参考答案：D
_____ for the free ticket, I would not have gone to the films so often.[ ]
A. If it is not
B. Were it not
C. Had it not been
D. If there were
外国当事人委托律师作为涉外民事案件的诉讼代理人，一般认为应委托（）
A.当事人本国的律师
B.第三国的律师
C.当事人住所地国的律师
D.法院地国的律师
