Daily Question: Environmental Knowledge (August 12) (2 points for answering, +4 points for a correct answer)
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This post was last edited by Huan Du Environmental Protection on 2015-8-14 at 11:11. The standards for environmental noise in urban areas stipulate that in residential areas and areas housing educational and cultural institutions, the noise level shall not exceed 55 decibels during the day, and shall not exceed ( ) decibels at night. The correct answer is C. A、30 B、40 C、45 D、50
The answer chosen is A, 30 decibels
The environmental noise standards for urban areas stipulate that in residential areas and areas housing educational and cultural institutions, the noise level shall not exceed 55 decibels during the day, and shall not exceed (45) decibels at night.
The environmental noise standards for urban areas stipulate that in residential areas and areas housing educational and cultural institutions, the noise level shall not exceed 55 decibels during the day, and shall not exceed (C, 45) decibels at night
C, 45 C, 45C, 45C, 45C, 45C, 45C, 45C, 45
C. 45 decibels------------
The environmental noise standards for urban areas stipulate that in residential areas and areas housing educational and cultural institutions, the noise level shall not exceed 55 decibels during the day, and shall not exceed (45) decibels at night.
Theoretically, it should be C, 45
The environmental noise standards for urban areas stipulate that in residential areas and areas housing educational and cultural institutions, the noise level shall not exceed 55 decibels during the day, and shall not exceed (45) decibels at night.
The environmental noise standards for urban areas stipulate that in residential areas and areas housing educational and cultural institutions, the noise level shall not exceed 55 decibels during the day, and shall not exceed ( ) decibels at night. C, 45