将氯化钙与湿物料放在一起，使物料中水分除去，这是采用哪种去湿方法（） 

A.百分比
B.密度
C.摩尔比
D.露点

A.0.1%  0.2%
B.0.2%  0.01%
C.0.2%  0.1%
D.0.1%  0.02%

A.46.66   60.06%
B.60.06   46.66%
C.60   46%
D.60    60%