廣東省惠州市20xx屆高三上學(xué)期第二次調(diào)研模擬考試英語(yǔ)試題word版含答案-文庫(kù)吧在線文庫(kù)
【正文】 are some of the most interesting things that happen. Do planes drop human waste while in flight? When you flush a toilet on a plane at an altitude of 30,000 feet, there must be a question on your mind: ―Is this about to land on a farmer‘s house?‖ Take it easy. A plane‘s toilets cannot be emptied in the sky. The waste is stored in tanks on board and can only be operated by the ground crew. However, why is news like ―blue ice falling out of a plane‖ reported? Is blue ice human waste? Stories about blue ice are true but rarely happen. The FAA said some lavatory holding tanks have a blue chemical in them. If a tank leaks high in the air, the water freezes once it hits the outside air, and melts before it lands on the ground. Is turbulence (顛簸 ) dangerous? It‘s scary, unfortable and spills your drink. But is turbulence something you really need to worry about? Absolutely not. It‘s part of flying, and it isn‘t dangerous. Turbulence is caused when two masses of air hit one another at different speeds. Wind, thunderstorms and closeness to mountains are all possible reasons. Despite how dangerous it feels, turbulence won‘t crash your plane. Even in extremely rough air, the wing is not going to break off. Why are plane windows round? If you have traveled by plane before, you may have noticed that every plane window has a round design. This isn‘t to make the plane look good. It‘s for the safety of everyone on board. As the airplane flies higher and higher, the outside atmospheric pressure gets lower and lower. In the end, the pressure inside the plane bees greater than the pressure outside. At this time, windows that can resist pressure are needed. Square windows can crack. The different pressure inside and outside put stress on the right angles. However, rounded corners help to reduce these stresses by spreading them around the window. 21. It can be learned from the passage that________. A. passengers‘ waste falls onto the land direct B. blue ice frequently falls out of planes C. blue ice from a plane is a great safety threat D. passengers‘ waste is dealt with on the ground 22. According to the passage, turbulence________. A. is very dangerous B. seldom happens during flying C. may crash a plane D. can be caused for many reasons 23. The plane window has a round design for the purpose of _________. A. economy B. security C. beauty D. convenience 24. The passage is meant to ________. A. tell us some interesting facts about flying B. inform us of flying safety tips C. warn us of the danger of flying D. introduce us the design of a plane B Chinese colleges have e up with an unusual way to help freshmen settle in. They turn their gyms into campsites for moms and dads, some of whom have traveled thousands of miles across the country, to say goodbye. For the past five years, Tianjin University in northern China has provided free acmodation for parents in what it calls tents of love. Other schools let parents sleep on mats in school gymnasiums. Going to college is a life moment and my parents didn‘t want to miss that, said Zhang Jinqi, a freshman at Tianjin University majoring in applied chemistry. His parents traveled with him on the 19hour train journey from Jiangxi province in southern China. Images of schools gyms packed with parents have been widely shared on Chinese social media prompting a debate on whether China‘s only children are too coddled. Some have voiced criticism of Tianjin University, saying that they think both the parents and the children should be more independent. Xiong Bingqi, the deputy director of thinktank 21st Century Education Research Institute，thinks the problem is overstated. It has always been a problem in China that at the start of every school year, colleges are packed with parents who e along to drop off their children and stay with them, he said. For some families, it‘s their way to celebrate the firstever family member who‘s able to go to college, Xiong added. There‘s nothing wrong with sharing the happiness
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