如图是某种物质熔化时温度随时间变化的图象.根据图象特征可判断该物质是____(选填“晶体”或“非晶体”);加热到第10min时,该物质的状态为____(选填“液态”、“固态”或“固液共存”).
下列各句中,加横线的成语使用恰当的一句是( )
A: —I'm ____ (sad; excited) because we're going to climb the mountain.
B: —That's ____(grey; great).
A: —I'm ____(scared; tired).
B: —Why are you scared?
A: —Because she's going into the cave. I heard a____ (toys; noise).
B: —Be careful!
When I got home, I saw my mother ________ the room.