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- 共用题干 第一篇Sleepless at NightIt was a normal summer night. Humidity（湿气）hung in the thick air.I couldnt...
- 共用题干 Germs（细菌）on BanknotesPeople in different countries use different types of money:yuan in China,...
- 共用题干 Ford1 Fords great strength was the manufacturing process一not invention.Long before he started ...
- 共用题干 Caribbean IslandsWhat would you see if you took a cruise to the Caribbean Islands?Palm trees a...
- 共用题干 第一篇Sleepless at NightIt was a normal summer night. Humidity（湿气）hung in the thick air.I couldnt...
- 共用题干 Batteries Built by VirusesWhat do chicken pox,the common cold,the flu,and AIDS have in common?...
- 共用题干 Forests for CitiesYou are standing in a beautiful forest in Japan. The air is clean and smells...
- 共用题干 Global WarmingFew people now question the reality of global warming and its effects on the wor...
- 共用题干 An Intelligent CarDriving needs sharp eyes, keen ears, quick brain, and coordination（协调）betwee...
- 共用题干 Wide World of RobotsEngineers who build and program robots have fascinating jobs. These resear...