A:2
B:513
C:﹣2016
D:﹣ 23
如图所示,电压U保持不变,当开关断开时,R1消耗的电功率为P1,当开关闭合时R1消耗的电功率P2,则( )
____This is a picture of my uncle's family. These are my uncle and aunt. Those are their children(孩子),Li Ming and Li Ling.
____ Look at the picture. This is my friend. His name is Jack.
____Here's a photo of my family. These are my grandparents. Those are my parents. This is me.
____Look at this picture. This is my father and that is my mother.
____ Look at the three boys. They are my cousins and me.
A B C
D E
已知A={x|﹣1<x≤3},B={x|m≤x<1+3m}
(1)当m=1时,求A∪B;
(2)若B⊆∁RA,求实数m的取值范围.