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- 共用题干 Animals “Sixth Sense”A tsunami（海啸）was triggered（引发）by an earthquake in the Indian Ocean in Dec...
- We should not sacrifice environmental protections to foster economic growth.
- 共用题干 第三篇Almost Human?Scientists are racing to build the worlds first thinking robot.This is not sci...
- 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 Sharks Perform a Service for Earths WatersIt is hard to get people to think of sharks as anyth...
- 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 Teaching Math,Teaching AnxietyIn a new study about the way kids learn math in elementary schoo...
- 共用题干 U. S. Scientists Confirm Water on MarsNASA scientists said that Mars was covered once by vast ...
- 共用题干 Caribbean IslandsWhat would you see if you took a cruise to the Caribbean Islands?Palm trees a...