脾的主要生理功能是（）
A.运化食物
B.运化水液
C.主升清
D.主统血
E.主四肢
参考答案：A, B, C, D
We wanted to get home before dark, but it didn't quite________ as planned. [ ]
A. turn up
B. turn out
C. come out
D. carry out
试述道岔号数的选择应符合哪些规定？
