题目内容
Use the following choices for questions 1 - 5:A. sulfur dioxideB. leadC. ozoneD. hydrocarbonsE. particulates1、Most often cited as the causative factor for acid deposition.______ 2、Considered harmful in the troposphere but beneficial in the stratosphere.______ 3、Is the major pollutant that electrostatic precipitators are designed to remove from power plant smokestack emissions.______ 4、Causes haze by scattering light.______ 5、Is released naturally from volcanos and anthropogenically from fuel combustion.______
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