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- 共用题干 Thirst for OilWorldwide every day,we devour the energy equivalent of about 200 million barrels...
- 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 第一篇Pushbike DangerLow speed bicycle crashes can badly injure一or even kill一children if they fal...
- 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 Chimpanzees1 Chimpanzees（黑猩猩）will soon be extinct（灭绝）.If the present rate of hunting and habit...
- 共用题干 Energy and Public LandsThe United States boasts substantial energy resources. Federal lands pr...
- 共用题干 An Intelligent CarDriving needs sharp eyes, keen ears, quick brain, and coordination（协调）betwee...
- Since the Great Depression,the United States government has protected farmers from damaging drops in...
- 共用题干 More Than 8 Hours Sleep Too Much of a Good Thing1 Although the dangers of too little sleep are...
- We packed up the things we had accumulated(累积)over the lastthree years and left.