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- 共用题干 第三篇The Science of the FutureUntil recently,thescience of the futurewas supposed to be electron...
- 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 Global WarmingFew people now question the reality of global warming and its effects on the wor...
- 共用题干 Earths Inner CoreScientists have long struggled to understand what lies at the planets center....
- 共用题干 第二篇Where Have All the Frogs Gone?In the 1980s,scientists around the world began to notice some...
- 共用题干 “Lucky” Lord Lucan一Alive or DeadOn 8th November 1974 Lord Lucan,a British aristocrat,vanished....
- 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 Global WarmingFew people now question the reality of global warming and its effects on the wor...
- 共用题干 When We Are AsleepEveryone dreams,but some people never recall their dreams,or do so very rare...
- 共用题干 Ecosystem1. The word “ecosystem” is short for ecological（生态的）system. An ecosystem is where liv...