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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 第一篇Almost Human?Scientists are racing to build the worlds first thinking robot.This is not sci...
- 共用题干 More Than 8 Hours Sleep Too Much of a Good Thing1 Although the dangers of too little sleep are...
- 共用题干 Narrow EscapeWe had left the hut too late that morning. When we stepped outside,the sky beyond...
- 共用题干 第一篇Renewable Energy SourcesToday petroleum（石油）provides around 40% of the worlds energy needs, ...
- 共用题干 第一篇U. S. Blacks Hard-hit by CancerDeath rates for cancer are falling for all Americans,but bla...
- She was close to success.
- We derive information mainly from the Internet.
- If I made a mistake,I will try to remedy it.
- 共用题干 The Northern LightsThe Sun is stormy and has its own kind of weather It is so hot and active t...