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- 共用题干 EarthquakeHow does an earthquake start?What makes an earthquake happen? The rock of the earths...
- 共用题干 第一篇How Animals Keep WarmMan has invented ways to keep warm,but how do animals defend themselve...
- 共用题干 The FamilyThe structure of a family takes different forms around the world and even in the sam...
- 共用题干 The iPad1 The iPad is a tablet computer（平板电脑）designed and developed by Apple. It is par-ticula...
- 共用题干 The Difference between Man and ComputerWhat makes people different from computer programs?What...
- 共用题干 Free Statins with Fast Food could Neutralize Heart RiskFast food outlets could provide statin ...
- 共用题干 Giant StructuresIt is an impossible task to select the most amazing wonders of the modern worl...
- 共用题干 Energy and Public LandsThe United States boasts substantial energy resources. Federal lands pr...
- 共用题干 Animals “Sixth Sense”A tsunami（海啸）was triggered（引发）by an earthquake in the Indian Ocean in Dec...
- 共用题干 Migrant（移民的）WorkersIn the past twenty years,there has been an increasing tendency for workers ...