Before she __________ to school, she always makes her lunch.[ ]
A. go
B. went
C. goes
答案:C
脑脊液的吸收部位是()。
A.室管膜细胞
B.蛛网膜粒
C.软膜
D.正中孔
E.外侧孔
识图要点有哪些