(____)I don't know.
(____)Where is my pencil?
(____)Li Hua, Where's your pencil?
(____)There it is.
(____)Danny, where is my pencil? Can you see it?(你看见它了吗?)
如图所示是常见的物态变化现象,其中需要吸热的是( )
下列各组物质在水溶液中能够共存,而且加入酚酞显红色的是( )