-Can I have some meat?    

-Certainly,just_______.     [    ]

A. take it as you like                              

B. eat it as you please      

C. help yourself                                    

D. help yourself at home

下列各组物质中，可依次通过溶解、过滤、蒸发等操作进行分离的是（　　）

A．氯化钾、氯化银

B．碳酸钠、硝酸钡

C．水、酒精

D．木炭、二氧化锰