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- 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 Animals “Sixth Sense”A tsunami（海啸）was triggered（引发）by an earthquake in the Indian Ocean in Dec...
- 共用题干 Giant StructuresIt is an impossible task to select the most amazing wonders of the modern worl...
- 共用题干 The Difference between Man and ComputerWhat makes people different from computer programs?What...
- 共用题干 Cloning（克隆）:Future Pertect?1 A clone is an exact copy of a plant or animal produced from any ...
- 共用题干 “Liquefaction” Key to Much of Japanese Earthquake DamageThe massive subduction zone earthquake...
- 共用题干 Eastern Quakes Can Trigger Big ShakesIn the first week of November 2011,people in central Okla...
- 共用题干 Earths Inner CoreScientists have long struggled to understand what lies at the planets center....