A: Can I help with the luggage It looks a bit heavy.
B: ().

A. Yes, they are full of books.

B. Don’t bother. I can take care of it myself.

C. Never mind. You don’t have to be so polite.

D. OK. Go ahead and do it.

引起外伤性脑积水的主要原因是（）

A.脑脊液分泌过多

B.脑脊液循环梗阻

C.脑萎缩

D.脑脊液吸收障碍

E.脑室出血