A:No, I'll be very busy
B:Yes, I'll be glad
C:Certainly, I'll be sorry
D:Certainly, I'll be glad to
饱和溶液____是浓溶液,如熟石灰的饱和溶液;不饱和溶液____ 是稀溶液,如接近饱和的硝酸钾溶液.(填“一定”、“不一定”)
+ =
- =
目前,一般城市选择远郊建造公租房、经济适用房,影响决策的主导因素是( )