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- 共用题干 Sharks Perform a Service for Earths WatersIt is hard to get people to think of sharks as anyth...
- The city has decided to do away with all the old buildings in its center.
- 共用题干 The Forbidden AppleNew York used to be the city that never sleeps. These days its the city tha...
- 共用题干 Solar StormAt the end of October 2003,a sudden solar storm hit the earth.A solar storm refers...
- 共用题干 “Liquefaction” Key to Much of Japanese Earthquake DamageThe massive subduction zone earthquake...
- 共用题干 Ants Have Big Impact on Environment as“Ecosystem Engineers”Research by the University of Exete...
- 共用题干 American DreamsThere is a common response to America among foreign writers:the US is a land of...
- 共用题干 “Liquefaction” Key to Much of Japanese Earthquake DamageThe massive subduction zone earthquake...
- 共用题干 Giant StructuresIt is an impossible task to select the most amazing wonders of the modern worl...
- A great deal has been done to remedy the situation.