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- 共用题干 Cloning（克隆）:Future Perlect?1 A clone is an exact copy of a plant or animal produced from any o...
- 共用题干 第一篇TapeStore: A New Tape Storage SystemTapeStore is a new kind of tape storage system which ca...
- 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 Ecosystem1. The word “ecosystem” is short for ecological（生态的）system. An ecosystem is where liv...
- 共用题干 Germs（细菌）on BanknotesPeople in different countries use different types of money:yuan in China,...
- 共用题干 第一篇U. S. Blacks Hard-hit by CancerDeath rates for cancer are falling for all Americans,but bla...
- 共用题干 “Liquefaction” Key to Much of Japanese Earthquake DamageThe massive subduction zone earthquake...
- 共用题干 第三篇Technology Transfer in GermanyWhen it comes to translating basic research into industrial s...
- 共用题干 A Heroic WomanThe whole of the United States cheered its latest hero,Ashley Smith,with the Fed...