The young couple decided to       their wedding until all the details were taken care of .

A．announce

B．maintain

C．postpone

D．simplify

对于固—液界面吸附，药剂在矿物表面的吸附量有两种表示方法：一种用单位面积上吸附药剂物质的量表示；另一种用单位质量矿物吸附的药剂量表示。