Production Technology [Daily Question] Thursday, 08.09.2011
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This post was last edited by sun-rock on 2011-9-10 08:56. Multiple choice: 1. What does COD refer to in environmental monitoring? ( ) A. Biochemical oxygen demand ； B. Chemical oxygen demand ； C. Air purity ； D. Noise intensity. 2. To protect hearing, it is generally believed that working for 8 hours a day at levels below ( ) decibels will not result in hearing loss. A, 110 ； B, 100 ； C, 80 ； D, 90. Notes: 1. Please hide your replies; for instructions, see: http://bbs.hcbbs.com/thread-492556-1-1.html. 2. Do not edit after replying. 3. All participants must receive a reward. Answer: 1B 2C
B. Chemical oxygen demand C. 80
Reply 1# *nyang3390 B D
Reply 1# *nyang3390 BC
Reply 1# *nyang3390 BC
Reply 1# *nyang3390 1. C 2. C
Reply 1# *nyang3390 A,C
1. In environmental monitoring, COD stands for (A). A. Biochemical oxygen demand ； B. Chemical oxygen demand ； C. Air purity ； D. Noise intensity. 2. For hearing protection, it is generally believed that working for 8 hours a day at levels below (C) decibels will not result in hearing loss. A, 110 ； B, 100 ； C, 80 ； D, 90.