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- 共用题干 Ecosystem1. The word “ecosystem” is short for ecological（生态的）system. An ecosystem is where liv...
- The walls are made of hollow concrete blocks.
- 共用题干 Ecosystem1. The word “ecosystem” is short for ecological（生态的）system. An ecosystem is where liv...
- 共用题干 Free Statins with Fast Food could Neutralize Heart RiskFast food outlets could provide statin ...
- 共用题干 The Joy of Living AloneMore and more Americans are living alone.Some live alone because of div...
- 共用题干 第一篇Motoring Technology1.2 million road deaths worldwide occur each year,plus a further 50 mill...
- 共用题干 Water一the Issue of This CenturyThe world is running short of freshwater. Populations are growi...
- 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 Chimpanzees1 Chimpanzees（黑猩猩）will soon be extinct（灭绝）.If the present rate of hunting and habit...
- 共用题干 第三篇Almost Human?Scientists are racing to build the worlds first thinking robot.This is not sci...