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- If headaches only occur at night,lack of fresh air is often the cause.
- There is a growing gap between the rich and the poor.
- 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 第二篇Saving MoneyWhere you save your money often depends on what you are saving for. If you are ...
- 共用题干 Why would They Falsely Confess?Why on earth would an innocent person falsely confess to commit...
- 共用题干 Ants Have Big Impact on Environment as“Ecosystem Engineers”Research by the University of Exete...
- 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 Caribbean IslandsWhat would you see if you took a cruise to the Caribbean Islands?Palm trees a...
- 共用题干 Black HolesMost scientists agree that black holes exist but are nearly impossible to locate.A ...