已知:集合A={x|3<x≤6),B={x|m≤x≤2m+l}
(1)若m=2,求A∩B,A∪B;
(2)若A⊆B,求实数m的取值范围;
(3)若A∩B=∅,求实数m的取值范围.
如图所示,一束光线垂直射到玻璃砖的一个面.作出这束光线进入玻璃砖内的径迹和从斜面离开玻璃砖后的大致径迹.要求在斜面处标出法线.
用所给词的适当形式填空
(1)My mother often ____ (read) books after work.
(2)The boy ____ (ride) a bike to school every day.
(3)Mum always ____ (wash) clothes on Saturday.
(4)Li Kai ____(have)a cool bag.
(5)My father never ____ (go) to work late.