Nature’s ways of maintaining the balance are simple and easily understood. According to the passage, the people’s living of man

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问题 Nature’s ways of maintaining the balance are simple and easily understood.
According to the passage, the people’s living of many countries could be seriously threatened by ______.

选项

答案the loss of soil fertility

解析由第四段第五句“Soil erosion results in loss of soil fertility and maintaining soil fertility is considered the biggest problem facing mankind apart from the prevention of war．”可知肥沃的土壤是阻止战争的重大问题，如果土壤不再肥沃，战争就可能爆发，世界人民的生活就会受到严重威胁。

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大学英语四级

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Nature’s ways of maintaining the balance are simple and easily understood. According to the passage, the people’s living of man

大学英语四级

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It’snosecretthatmanychildrenwouldbehealthierandhappierwithadoptiveparentsthanwiththeparentsthatnaturedealtt

Lastyear’seconomyintheUnitedStatesshouldhavewontheOscarforbestpicture.Growthingrossdomesticproductwas4.1pe

IngredientsforHappinessNo,happinessisn’talotteryticketaway.Iamfascinatedbyacademicstudiesofhumanhappin

Butthenhewaswonderfullygood-looking,withhisbrownhair,his______face,andhisgreyeyes.

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A、Aclassthatthewomanistaking.B、Ajobpossibility.C、Achemistryassignment.D、Astudythattheirchemistryprofessordid.

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