题目内容
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. It can be inferred that without gravity ______.
查看答案
搜索结果不匹配？点我反馈
更多问题
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. The underlined word "shoot" in the 2nd passage probably means "______".
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.
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.
C More than 10 years ago, it was difficult to buy a tasty pineapple (菠萝). The fruits that made it to the UK were green on the outside and, more often than not, hard with an unpleasant taste within. Then in 1966, the Del Monte Gold pineapple produced in Hawaii first hit our shelves. The new type of pineapple looked more yellowy-gold than green. It was slightly softer on the outside and had a lot of juice inside. But the most important thing about this new type of pineapple was that it was twice as sweet as the hit-and-miss pineapples we had known. In no time, the Del Monte Gold took the market by storm, rapidly becoming the world’s best-selling pineapple variety, and delivering natural levels of sweetness in the mouth, up until then only found in tinned pineapple. In nutrition (营养)it was all good news too. This nice tasting pineapple contained four times more vitamin C(维生素C)than the old green variety. Nutritionists said that it was not only full of vitamins, but also good against some diseases. People were understandably eager to be able to buy this wonderful fruit. The new type of pineapple was selling fast, and the Del Monte Gold pineapple rapidly became a fixture in the shopping basket of the healthy eater. Seeing the growing market for its winning pineapple, Del Monte tried to keep market to itself. But other fruit companies developed similar pineapples. Del Monte turned to law for help, but failed. Those companies argued successfully that Del Monte’s attempts to keep the golden pineapple for itself were just a way to knock them out the market. The underlined word "fixture" in Paragraph 3 probably refers to something ______.
微信支付 
支付宝支付