People who live in heavily industrialized areas do get as much sunlight as they should Dust 1 over a city at altitudes 海拔 of 4 000 8 000 feet cuts out 20 50 percent of
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答案:People who live in heavily industrialized areas do not get as much sunlight as they should. Dust at altitudes of 4,000 to 8,000 feet cuts out 20 to...
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