单项选择题

Which of the following is the most primary reason for the formation of acid rain

A．Chemical processes in the atmosphere.
B．Dry gases and particulates.
C．The burning of coal and oil.
D．The prevailing wind.
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单项选择题
The airborne particulates tend to wind up in the Northeast airborne here means.
A．produced by air
B．emerged in the air
C．floating
D．polluting
单项选择题
The damaging effects of acid rain are felt less in the West because _________.
A．Western parts produce much less than a quarter of sulfur oxide emissions
B．Western soils can neutralize the acid
C．Westernly wind spread participants out of the western regions
D．chemical industry is less developed in the western states
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