短文，选择正确的答案。
Hello. I'm Xu Wei. This is my sister, Xu Yi. And this is my brother, Xu Feng. This is my bedroom. Look, that is my new dress on the bed. I like it very much. My shorts are on the chair. My jeans are on the chair, too. That sweater isn't my sweater. It's my sister's. She's Xu Yi. The sweater is beautiful. I'd like one.
重力加速度为g，则物
块上升的最大高度和返回到原抛出点的速率分别为( )