问题
单项选择题
在项目的大气影响评价中，排气筒排放的颗粒小于( )μm时，其地面浓度的预测可以用气体模式计算。
A．5μm
B．10μm
C．15μm
D．20μm
答案
参考答案：C
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在项目的大气影响评价中，排气筒排放的颗粒小于( )μm时，其地面浓度的预测可以用气体模式计算。
A．5μm
B．10μm
C．15μm
D．20μm
参考答案：C
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