物体A静止在水平面上，请画出物体A所受力的示意图．

    在“人机围棋大战”的前一天，谷歌董事长在发布会上表示，这场比赛  ①  李世石输赢都代表着人类的胜利，  ②  是人类的努力才让人工智能取得了这样的突破；谷歌  ③  想做一个棋类程序，  ④  希望打造一个通用的智能计算系统，  ⑤  用于灾害预测、风险控制、医疗健康和机器人等复杂领域。英国著名人工智能科学家罗洛·卡朋特表示，他相信人类在相当长一段时间内将保持对人工智能技术的掌控，  ⑥  未来将实现利用人工智能技术解决众多世界性难题这一目标。

泥石流的概念：是指在    ____   因为  ____    或其他原因引发的携带有大量____             的特殊洪流。是一种灾害性的       ____ 现象。

    A small plane had some trouble with its engine while it was in the high sky. The pilot knew that there was nothing he could do to keep the plane long in the air, so he rushed back to where his three passengers sat and explained the dangerous situation. At last he said, "I am a married man with three children. I am sorry to tell you that there are only three parachutes aboard. " With that he took up one and jumped out.
    One of the passengers reacted quickly. “I am a great man, I am the smartest man and the world can not do without me. "With that he too jumped out.
   The other two passengers, an old man and a young soldier, were quiet for a moment. At last the old man said, “Son, I'm old and have lived a full life. I am ready to meet my God.”
“You will have to give up that,”the young man said, smiling,“The world's smartest man just jumped out with my backpack.”