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- 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 Water一the Issue of This CenturyThe world is running short of freshwater. Populations are growi...
- It seemed incredible that he had been there a week already.
- 共用题干 Travel Across AfricaFor six hours we shot through the barren（荒芜的）landscape of the Karoo desert...
- As a politician,he knows how to manipulate public opinion.
- 共用题干 Where Has the Salt Come from?Every now and then,we meet a fact about our earth that makes us f...
- 共用题干 Germs（细菌）on BanknotesPeople in different countries use different types of money:yuan in China,...
- Her sister urged her to apply for the job.
- During the past ten years there have been dramatic changes in the international situation.
- 共用题干 Ford1 Fords great strength was the manufacturing process一not invention.Long before he started ...