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- If headaches only occur at night,lack of fresh air is often the cause.
- 共用题干 Canadian Parents Win Legal Battle against HomeworkUsually it is the children,not the parents,w...
- 共用题干 Global WarmingFew people now question the reality of global warming and its effects on the wor...
- Relief workers were shocked by what they saw.
- “There is no other choice,”she said in a harsh voice.
- 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 Thirst for OilWorldwide every day,we devour the energy equivalent of about 200 million barrels...
- 共用题干 Save Energy At HomeOn the average,Americans waste as much energy as two-thirds of the worlds p...
- 共用题干 The Forbidden AppleNew York used to be the city that never sleeps. These days its the city tha...
- 共用题干 Animals “Sixth Sense”A tsunami（海啸）was triggered（引发）by an earthquake in the Indian Ocean in Dec...