–Could you tell me      ?

–I ’m confident and creative.

A．how you are

B．what are you like

C．what you are like

D．how are you

泡沫灭火剂按生成机理分为（）.

A.空气泡沫和化学泡沫

B.高倍泡沫和低倍泡沫

C.普通泡沫和抗溶性泡沫