题目

如图，是用绳子从水中提升重物的情景。若已知物体的质量为250kg、体积为0.1m3，g取10N/kg。求： （1）物体的重力和物体浸没在水中排开水的重力。 （2）物体浸没在水中所受的浮力和缓慢提升物体时绳子所受的拉力。 （3）凭你的力气无法直接将该物体提出水面。请你运用所学知识提出解决措施，并在图中画出具体措施的示意图。“The brightest light in the darkest night”        The movie Babel is hot on screen now. The title of the movie refers to the story in the Bible（圣经）where people tried to build a tower to reach Heaven. Angry God prevented them by confusing their languages so that they could no longer understand one another.        The movie tells a number of intersecting（相交）stories about the world we live in and the problems we suffer due to our inability to communicate.        The first story talks about a married couple Brad and Cate visiting Morocco. One day they′re traveling by bus through a rocky area when a gunshot wounds the wife. The husband flies into hysterics trying to save her life. However, since he′s in a foreign country, he suffers from his inability to communicate with the locals.        Then, there′s the story of the shooters, Yussef and his brother, who are given a gun by their father to help guard the sheep. They are fooling around with the gun and fire a shot on a passing bus. At first, they refuse to tell anybody what happened for fear of the trouble but when the police come knocking, they are forced to come out with the truth with tragic results.        The next story follows the children of Brad and Cate. They are living back in California under the care of the family nanny, Amelia. The shooting delays the return of their parents but Amelia was eager to attend her son′s wedding in Mexico. At last she is forced to bring the children over the border（边境）along with her nephew Santiago. When traveling back over the border later that evening, they are stopped and questioned by the border police. After a couple of miscommunications, they are asked for some identification（身份）at which point Santiago tries to escape and leave Amelia and the children in the middle of the desert.        The final story deals with a Japanese family Chieko and her father Yasujiro, who sold the gun to the father of the two young boys. Chieko is a deaf mute（哑巴）who has a whole other set of communication problems. And because her inability to communicate makes her“different”, she isn′t afraid to give a little attitude to anyone who she thinks deserves it. How does her father fit into all of this? 2,4,6          The movie really opens people′s eyes to a lot of problems in our modern world. It′s just a great job all around. The best movie this year! 1．Who shoots the tour bus on which Brad and Cate sit?       A．Amelia.               B．Chieko.               C．Santiago.             D．Yussef. 2．Why does Santiago try to escape at the border?        A．He didn′t have proper identification.        B．He doesn′t expect the police are waiting,        C．He thinks the children are a trouble for him        D．He doesn′t love Amelia any more. 3．How do you understand the underlined sentence?        A．She thinks everyone deserves his inability        B．She is tough in some ways to the people around.        C．She is shy to communicate with people around.        D．She is not afraid to show her attitude to others. 4．What message does the movie mean to give people?        A．It′s very dangerous for young people to play with guns.        B．Communication is very important when traveling abroad.        C．Different languages and cultures make the world life difficult.        D．Language is the most important thing in our modern world