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- 共用题干 A Doctor in the HouseBrushing your teeth twice a day should keep the dentist away. But if a gr...
- 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 第三篇Human Space ExplorationWhile scientists are searching the cause of the Columbia disaster,NA...
- 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 Batteries Built by VirusesWhat do chicken pox,the common cold,the flu,and AIDS have in common?...
- It is the movement,not the color,of objects that excites the bull.
- I have little information as regards her fitness for the post.
- 共用题干 Chimpanzees1 Chimpanzees（黑猩猩）will soon be extinct（灭绝）.If the present rate of hunting and habit...
- “What do you mean by that?”Paul asked sharply.
- 共用题干 The Difference between Man and ComputerWhat makes people different from computer programs?What...