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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 Ecosystem1. The word “ecosystem” is short for ecological（生态的）system. An ecosystem is where liv...
- 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 Chimpanzees1 Chimpanzees（黑猩猩）will soon be extinct（灭绝）.If the present rate of hunting and habit...
- 共用题干 Every Dog Has His SayKimiko Fukuda always wondered what her dog was trying to say. Whenever sh...
- 共用题干 Travel Across AfricaFor six hours we shot through the barren（荒芜的）landscape of the Karoo desert...
- 共用题干 第一篇More Than a Ride to SchoolThe National Education Association claims,The school bus is a mir...
- 共用题干 Wide World of RobotsEngineers who build and program robots have fascinating jobs. These resear...
- With immense relief I stopped running.
- 共用题干 DVD for Rent1.A pay-for-play system for video DVD will emerge by summer as an alternative,a...