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- 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 第三篇Renewable Energy SourcesToday petroleum（石油）provides around 40% of the worlds energy needs ,...
- 共用题干 Global WarmingFew people now question the reality of global warming and its effects on the wor...
- 共用题干 EarthquakeHow does an earthquake start?What makes an earthquake happen? The rock of the earths...
- 共用题干 Wide World of RobotsEngineers who build and program robots have fascinating jobs. These resear...
- 共用题干 Pop Music in AfricaYoung musicians in African countries are creating a new kind of pop music. ...
- 共用题干 第三篇TapeStore: A New Tape Storage SystemTapeStore is a new kind of tape storage system which ca...
- 共用题干 Germs（细菌）on BanknotesPeople in different countries use different types of money:yuan in China,...
- 共用题干 “Liquefaction” Key to Much of Japanese Earthquake DamageThe massive subduction zone earthquake...
- 共用题干 第一篇Sleepless at NightIt was a normal summer night. Humidity（湿气）hung in the thick air.I couldnt...