A:{x|x<﹣4或x>3}
B:{x|﹣4<x<3}
C:{x|x≤﹣4或x≥3}
D:{x|﹣4≤x≤3}
下列现象中,通过热传递改变物体内能的是( )
下图是甲、乙两种固体物质(不含结晶水)的溶解度曲线,从图中可获得的信息是
A. white B. orange C. pencil D. pen E. green
Hi, I'm Lucy. I have a pencil box. It's ____ I have a ____ It's black. I have an eraser. It's ____ I have a ____ It's red. I have a crayon. It's____