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dB is a standard abbreviation used for the quantitative expression of
Option: 1
A certain pesticide
Option: 2
The density of bacteria in a medium
Option: 3
A particular pollutant
Option: 4
The dominant Bacillus in a culture
Answers (1)
dB stands for decibel. This is the standard abbreviation used for the quantitative representation of sound levels. It is used to measure the relative intensity of sounds. High levels correspond to noise pollution.So the correct option is A, a specific pollutant. Hence, option 3 is correct.
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