（1）原式=2-4+4×12=-2+2=0；
（2）原式=2+3+3=5+3．
I used to _____ a lot, but now I have become fatter, for I mainly stay at home watching TV.[ ]
A. turn out
B. work out
C. help out
D. take out
下列属于液的功能的是？（）
A.濡润肌肤
B.濡润孔窍
C.滑利血脉
D.滑利关节
E.入脉化血
