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- 共用题干 Every Dog Has His SayKimiko Fukuda always wondered what her dog was trying to say. Whenever sh...
- 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 Chimpanzees1 Chimpanzees（黑猩猩）will soon be extinct（灭绝）.If the present rate of hunting and habit...
- 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 Travel Across AfricaFor six hours we shot through the barren（荒芜的）landscape of the Karoo desert...
- 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 Solar StormAt the end of October 2003,a sudden solar storm hit the earth.A solar storm refers...
- 共用题干 The Greatest Mystery Of WhalesThe whale is a warm-blooded,air-breathing animal,giving birth to...
- The study also notes a steady decline in the number of college students taking science courses.