最大增溶浓度的正确表述是（）
A.CMC
B.MAC
C.CAC
D.HLB
E.IPC
参考答案：B
句型转换。
1. She has been studying in this school for 3 years.(对画线部分提问)
2. He's very frightened. He can't move. (合并为一句)
3. Lily sometimes goes camping.(对画线部分提问)
4. What are you doing for vacation? (用go camping回答)
I'm______ ______for vacation.
5. I just finished my model plane.(改为一般疑问句)
______ you______ ______ your model plane?
已知：甲为固体，乙、丙、丁为气体，在一定条件下，它们之间可发生下列反应：甲+乙→丙；乙+丁→丙；甲+丙→丁，则甲可能是（ ）
A．Fe
B．CuO
C．CaCO3
D．C
