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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:666

【原创】 Vehicles, coal-burning, airborne dust and industrial production ______85 to 90 percent of the major airborne pollution sources in most Chinese cities, the newest research shows.

A.account for B.call for
C.make up for D.provide for
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【原创】 Vehicles, coal-burning, a