“墙内开花墙外香”是 ______现象，说明分子在 ______．
“墙内开花墙外香”是分子运动的结果，即扩散现象．
故答案为：扩散，不停地做无规则运动．
--- We have just watched a wonderful movie! Iron man is really excellent!
--- ___________. I have never watched a better film than this one.
A．You’ re dead right
B．Personally, I disagree with you
C．I’m not sure about you
D．I can’t stand it
DDZ-Ⅱ型电动差压变送器采用（）作为统一标准信号。
A.0.02~0.1MPa
B.4~20mA.DC
C.1~4V.DC
D.0~10mA.DC
