Let's home now.[ ]
A. at
B. in
C. go
答案:C
系统温度大于露点时,体系处于()
A.饱和液相
B.过热气相
C.饱和气相
D.气液两相
成人食管第3狭窄距中切牙的距离约为 ( )
A.15cmB.25cmC.30cmD.40cmE.50cm