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- 共用题干 An Intelligent CarDriving needs sharp eyes, keen ears, quick brain, and coordination（协调）betwee...
- 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 The Smog（烟雾）For over a month,lndonesia was in crisis.Forest fires raged out of control as the ...
- 共用题干 Thirst for OilWorldwide every day,we devour the energy equivalent of about 200 million barrels...
- When I heard the noise in the next room,I couldnt resist having a peep.
- 共用题干 Giant StructuresIt is an impossible task to select the most amazing wonders of the modern worl...
- 共用题干 Early Ideas about the Universe1 Early man got his ideas about the universe by looking at the s...
- The weather was crisp and clear and you could see the mountains fifty miles away.
- 共用题干 Batteries Built by VirusesWhat do chicken pox,the common cold,the flu,and AIDS have in common?...
- I have been trying to quit smoking.