颅脑外伤后，下面哪种情况可引起低颅压综合征（）
A.颅内积气
B.脑脊液漏
C.颅底骨折
D.颅骨粉碎性骨折
E.颅内血肿
参考答案：B
—What do you mean ________ saying “The boy is overgrowing”?
— I mean that he is tall ________ his age.
A．by; for
B．as to; for
C．about; with
D．by; to
中量咯血是指咯血量在（）
A.<100ml
B.>200ml
C.100～400ml
D.>400ml
E.>600ml
