已知A={x|﹣1＜x＜2}，B={x|2^x＞1}

（1）求A∩B和A∪B；

（2）若记符号A﹣B={x|x∈A，且x∉B}，

①在图中把表示“集合A﹣B”的部分用阴影涂黑；

②求A﹣B和B﹣A．

为了测出楼房的高度，让一块石头从房顶自由落下，测出下列哪些物理量能算出楼房的高度（   ）

    Tom was only seven years old. He likes watching ____ very much. He ____ went to the movies before. One day, he ____ to have a try. When getting to the cinema, he bought a ticket (票) and went in. ____ after two or three minutes, he came out, and bought the second ticket and went in. After a few minutes, he came out again and bought the third ticket. 

    Then a girl ____ about him and asked, “Why do you buy so many tickets? How many friends do you meet?” “No, I have no friends here, but a woman always stops me at the door and tears (撕) my ticket.”

下列山脉中属于东北—西南走向的一组是（    ）