( ) 1. Who is your English teacher? ( ) 2. Did your father buy you a bike? ( ) 3. What did his pen pal do? ( ) 4. Are you heavier than him? ( ) 5. How much is the sweater?
A. No, I'm not. C. It's 30 yuan. E. Yes, he did. B. Mr White. D. Played the violin.
、
，则在该溶液中不能大量存在的离子组是( ) 
、F- ②K+、Ba2+、Cl- ③Fe2+、Cl-、Br- ④K+、Na+、ClO-