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- 共用题干 Walk a Quarter-Mile or DiemIf you can walk a quarter-mile,odds（可能性）are you have at least six y...
- 共用题干 第一篇Renewable Energy SourcesToday petroleum（石油）provides around 40% of the worlds energy needs, ...
- 共用题干 Giant StructuresIt is an impossible task to select the most amazing wonders of the modern worl...
- 共用题干 第一篇TapeStore: A New Tape Storage SystemTapeStore is a new kind of tape storage system which ca...
- He paused,waiting for her to digest the information.
- 共用题干 More Than 8 Hours Sleep Too Much of a Good Thing1 Although the dangers of too little sleep are...
- 共用题干 第三篇Trying to Find a PartnerOne of the most striking findings of a recent poll in the UK is tha...
- 共用题干 Giant StructuresIt is an impossible task to select the most amazing wonders of the modern worl...
- 共用题干 Cloning（克隆）:Future Perlect?1 A clone is an exact copy of a plant or animal produced from any o...
- 共用题干 Global WarmingFew people now question the reality of global warming and its effects on the wor...