题干

《愤怒的小鸟》是曾经一款非常流行的游戏,故事也相当有趣,如图甲,为了报复偷走鸟蛋的肥猪们,鸟儿以自己的身体为武器,如炮弹般弹射出去攻击肥猪们的堡垒.高二(1)班的同学们根据自己所学的物理知识进行假设:小鸟被弹弓沿水平方向弹出,如图乙所示.已知:h1=0.8m,l1=2.2m,h2=2.4m,l2=1m,l3=2m.请回答下面三位同学提出的问题:(取重力加速度g=10m/s2

上一题 下一题 0.0难度 选择题 更新时间:2019-05-13 08:45:05

答案(点此获取答案解析)

同类题1

阅读下面短文,掌握其大意,从每题所给的A、B、C、D四个选项中,选出最佳选项。

    If life were a book and you were the author, how would you like the story to go? That is the question that 1 my life forever.

    One day I went home from the training of snowboarding with what I thought was the flu, and less than 24 hours later, I was in a 2 on life support with less than two percent 3 of living. It wasn't until days later that the doctors diagnosed me with a 4 blood infection.

    Over the 5 of 2.5 months, I lost the hearing in my left ear and both my legs below the knee. When my parents 6 me out of the hospital, I 7 that I had been put together like a patchwork(拼缝物) doll and I had to live with 8 legs. I was absolutely physically and emotionally broken, 9 streaming down.

    But I knew in order to move forward, I had to let go of the Old Amy and 10 the New Amy. It was at this moment that I asked myself that significant 11. And that is when it 12 me that I didn't have to be five-foot-five anymore,13 I could be as tall as I wanted. And 14 of all, I can make my feet the size of all the shoes. So there were 15 here.

    Four months later, I was back upon a 16. And this February, I won two Board World Cup gold medals, 17 me the highest ranked snowboarder in the world.

    So, instead of looking at our 18 and our limitations as something 19 or bad, we can begin looking at them as a wonderful 20 that can be used to help us go further than we ever know we could go.