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- 共用题干 第三篇Human Space ExplorationWhile scientists are searching the cause of the Columbia disaster,NA...
- 共用题干 U. S. Scientists Confirm Water on MarsNASA scientists said that Mars was covered once by vast ...
- 共用题干 Batteries Built by VirusesWhat do chicken pox,the common cold,the flu,and AIDS have in common?...
- Michael is now merely a good friend,
- 共用题干 第三篇Human Space ExplorationWhile scientists are searching the cause of the Columbia disaster,NA...
- 共用题干 The Forbidden AppleNew York used to be the city that never sleeps. These days its the city tha...
- The policeman wrote down all the particulars of the accident.
- 共用题干 第二篇Good Table MannersManners play an important part in making a favorable impression at the di...
- 共用题干 Narrow EscapeWe had left the hut too late that morning. When we stepped outside,the sky beyond...
- The decision to invade provoked storms of protest.