GMM’s friend: Just be careful. You may break the antique vase.

Guo Meimei:  _________? My boyfriend has nothing but money.

A．Why not

B．How come

C．So what

D．What for

干燥失重测定法是测定（）。

A．不溶性杂质

B．遇硫酸易碳化的杂质

C．水分及其他挥发性物质

D．有色杂质

E．硫酸盐杂质