某溶液中存在大量的H+、SO42-、Cl-,该溶液中还可能大量存在的离子是
( )—Is this your backpack? —Yes, _______.
( )—What’s this? —It’s_______.
( )._______, Linda. What’s this in English?
( )—Your English is very good —_______.
( ) That is_______ apple.