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- 共用题干 Learn about Light1 .Ancient civilizations were amazed by the existence of light for thousands ...
- Traffic reaches its rush hour between 8:00 and 9:00 in the morning.
- 共用题干 第一篇Renewable Energy SourcesToday petroleum（石油）provides around 40% of the worlds energy needs, ...
- The river widens considerably as it begins to turn west.
- 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 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 Female BullfightingIt was a unique,eye-catching sight:an attractive woman in a shiny bullfight...
- 共用题干 第一篇TapeStore: A New Tape Storage SystemTapeStore is a new kind of tape storage system which ca...