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- 共用题干 Global WarmingFew people now question the reality of global warming and its effects on the wor...
- 共用题干 Ecosystem1. The word “ecosystem” is short for ecological（生态的）system. An ecosystem is where liv...
- 共用题干 New Product Will Save livesDrinking water that looks clean may still contain bugs（虫子）,which ca...
- 共用题干 Learn about Light1 .Ancient civilizations were amazed by the existence of light for thousands ...
- She came across three children sleeping under a bridge.
- We have to change the publics perception that money is everything.
- 共用题干 Giant StructuresIt is an impossible task to select the most amazing wonders of the modern worl...
- 共用题干 “Liquefaction” Key to Much of Japanese Earthquake DamageThe massive subduction zone earthquake...