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- 共用题干 Canadian Parents Win Legal Battle against HomeworkUsually it is the children,not the parents,w...
- 共用题干 The Forbidden AppleNew York used to be the city that never sleeps. These days its the city tha...
- 共用题干 第一篇Renewable Energy SourcesToday petroleum（石油）provides around 40% of the worlds energy needs, ...
- 共用题干 Sharks Perform a Service for Earths WatersIt is hard to get people to think of sharks as anyth...
- 共用题干 The Northern LightsThe Sun is stormy and has its own kind of weather It is so hot and active t...
- 共用题干 Travel Across AfricaFor six hours we shot through the barren（荒芜的）landscape of the Karoo desert...
- 共用题干 Thirst for OilWorldwide every day,we devour the energy equivalent of about 200 million barrels...
- 共用题干 Giant StructuresIt is an impossible task to select the most amazing wonders of the modern worl...
- 共用题干 Understanding Autism1 Autism（孤独症）is a life-long developmental disability that prevents individ...
- She came across three children sleeping under a bridge.