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- 共用题干 When We Are AsleepEveryone dreams,but some people never recall their dreams,or do so very rare...
- 共用题干 DVD for Rent1.A pay-for-play system for video DVD will emerge by summer as an alternative,a...
- 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 Sharks Perform a Service for Earths WatersIt is hard to get people to think of sharks as anyth...
- 共用题干 Earths Inner CoreScientists have long struggled to understand what lies at the planets center....
- 共用题干 The Greatest Mystery Of WhalesThe whale is a warm-blooded,air-breathing animal,giving birth to...
- 共用题干 Robots May Allow Surgery in SpaceSmall robots designed by University of Nebraska researchers m...
- The sea turtles natural habitat has been considerably reduced.
- He cannot discriminate between a good idea and a bad one.
- 共用题干 Animals “Sixth Sense”A tsunami(海啸)was triggered(引发)by an earthquake in the Indian Ocean in Dec...