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D 1. Why do airplanes take longer to fly west than east It can take five hours to go west-east from New York (NY) to London but seven hours to travel east-west from London to NY. The reason for the difference is an atmospheric phenomenon known as the jet(喷射) stream. The jet stream is a very high altitude wind which always blows from the west to the east across the Atlantic. The planes moving at a constant air speed thus go faster in the west-east direction when they are moving with the wind than in the opposite direction. 2. What would happen if the gravity on Earth was suddenly turned off Supposing we could magically turn off gravity. Would buildings and other structures (建筑物) float away What happened would depend on how strongly the things were attached to the Earth. The Earth is moving at quite a speed, moving at over a thousand miles per hours. If you turn something around your head on a string(细绳), it goes around in a circle until you let go of the string. Then it flies off in a straight line.’Switching off’gravity would be like letting go of the string. Things not attached to the Earth would fly off in a straight line. People in buildings would suddenly shoot upwards at a great speed until they hit the ceiling. Most things outside would fly off into space. What information can we get from the first passage
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The requirements for high school graduation have just changed in my community. As a result, all students must 1 sixty hours of service learning, 2 they will not receive a diploma. Service learning is academic learning that also helps the community. 3 of service learning include cleaning up a polluted river, working in a soup kitchen, or tutoring a student. 4 a service experience students must keep a journal(日志)and then write a 5 about what they have learned. Supporters claim that there are many 6 of service learning. Perhaps most importantly, students are forced to think 7 their own interests and become 8 of the needs of others. Students are also able to learn real-life skills that 9 responsibility, problem-solving, and working as part of a team. 10 , students can explore possible careers 11 service learning. For example, if a student wonders what teaching is like, he or she can choose to work in an elementary school classroom a few afternoons each month. 12 there are many benefits, opponents(反对者) 13 problems with the new requirement. First, they 14 that the main reason students go to school is to learn core subjects and skills. Because service learning is time-consuming, students spend 15 time studying the core subjects. Second, they believe that forcing students to work without 16 goes against the law. By requiring service, the school takes away an individual’s freedom to choose. In nay view, service learning is a great way to 17 to the community, learn new skills, and explore different careers. 18 , I don’t believe you should force people to help others — the 19 to help must come from the heart. I think the best 20 is one that gives students choices: a student should be able to choose sixty hours of independent study or sixty hours of service. Choice encourages both freedom and responsibility, and as young adults, we must learn to handle both wisely.
孟子说：“人之性善也，犹水之就下也，人无有不善，水无有不下。”又说：“食色，性也。”荀子说：“人之性恶，其善者伪(人为)也。”根据材料请回答下列问题： 孟子和荀子在人的本质问题上的观点是什么错在哪里
阅读下列材料：材料1“在当代中国，坚持发展是硬道理的本质要求，就是坚持科学发展，更加注重以人为本，更加注重全面协调可持续发展，更加注重统筹兼顾，更加注重保障和改善民生，促进社会公平正义”。——摘自党的十七届五中全会文件材料2“以经济建设为中心是兴国之要，发展仍是解决我国所有问题的关键。只有推动经济持续健康发展，才能筑牢国家繁荣富强、人民幸福安康、社会和谐稳定的物质基础。必须坚持发展是硬道理的战略思想，决不能有丝毫动摇。”——摘自党的十八大政治报告材料3“必须更加自觉地把以人为本作为深入贯彻落实科学发展观的核心立场，始终把实现好、维护好、发展好最广大人民根本利益作为党和国家一切工作的出发点和落脚点，尊重人民首创精神，保障人民各项权益，不断在实现发展成果由人民共享、促进人的全面发展上取得新成效。”——摘自党的十八大政治报告请回答： 材料3体现了历史唯物主义的何种原理试分析说明。
E When you are little, the whole world feels like a big playground. I was living in Conyers, Georgia, the summer it all happened. I was a second grader, but my best friend Stephanie was only in the first grade. Both of our parents were at work and most of the time they let us go our own way. It was a hot afternoon and we decided to have an adventure in Stephanie’s basement. As I opened the basement door, before us lay the biggest room, full of amazing things like guns, dolls, and old clothes. I ran downstairs, and spotted a red steel can. It was paint. I looked beyond it and there lay even more paint in bright colors like purple, orange, blue and green. "Stephanie, I just found us a project for the day. Get some paint brushes. We are fixing to paint. " She screamed with excitement as I told her of my secret plans and immediately we got to work. We gathered "all the brushes we could find and moved all of our materials to my yard. There on the road in front of my house, we painted bit stripes (条纹) of colors across the pavement (人行道). Stripe by stripe, our colors turned into a beautiful rainbow. It was fantastic! The sun was starting to sink. I saw a car in the distance and jumped up as I recognized the car. It was my mother. I couldn’t wait to show her my masterpiece. The car pulled slowly into the driveway and from the look on my mother’s face, I could tell that I was in deep trouble. My mother shut the car door and walked towards me. Her eyes glaring, she shouted, "What in the world were you thinking I understood when you made castles out of leaves, and climbed the neighbors’ trees, but this ! Come inside right now! " I stood there glaring back at her for a minute, angry because she had insulted (侮辱) my art. "Now go clean it up!" Mother and I began cleaning the road. Tears ran down my cheeks as I saw my beautiful rainbow turn into black cement. Though years have now passed, I still wonder where my rainbow has gone. I wonder if, maybe when I get older, I can find my rainbow and never have to brush it away. I guess we all need sort of rainbow to brighten our lives from time to time and to keep our hopes and dreams colorful. What did the writer want to do when his mother came home
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