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This post was last edited by liuquan1100 on 2017-9-11 08:43. [Daily Question No. 066] 2017.09.11: Leakage protection devices are primarily used to prevent electric shock accidents caused by leakage current, or to avoid single-phase electric shock incidents. ( ) Check the reference answers after responding; points will be awarded by identifying the key points. The answers to the daily activity questions have changed; today’s answers will be shown in the subsequent questions. For management purposes, if you need to view content from a few days ago, please access it through the summary post below. Summary post of Q&A questions for 2017 (updates have begun): http://bbs.hcbbs.com/thread-1657793-1-1.html Summary post of daily questions for 2017 (updates have begun): http://bbs.hcbbs.com/thread-1657794-1-1.html Summary post of Q&A questions for 2016 (updates completed): http://bbs.hcbbs.com/thread-1597792-1-1.html Petrochemical industry zone – “Creative Ideas for Energy Saving” campaign (the second phase is in full swing): http://bbs.hcbbs.com/thread-1666758-1-1.html (Source: Haichuan Chemical Industry Forum Website) [Daily Question No. 061] September 6, 2017: Static electricity discharge can occur when people wear clothes made of synthetic materials, comb their hair, walk on dry surfaces, or do other activities. Regarding 【Question of the Day No. 062】, dated September 7, 2017: HSE is an acronym for the English nouns health, （ ）, and environment. (A) Management (B) Production (C) Insurance (D) Safety. Answer: D 【Daily Question No. 063】 September 8, 2017. Safety signs are divided into four types: prohibition signs, warning signs, instruction signs, and guidance signs. 【Daily Question No. 064】 September 9, 2017. Fires caused by the combustion of liquids of categories A, B, and C, such as gasoline, diesel, methanol, ether, and propane. (A) Class A fire (B) Class B fire (C) Class C fire (D) Class D fire. B【Daily Question No. 065】 September 10, 2017: The tissue most severely damaged by acute carbon monoxide (CO) poisoning is: ( ) (A) Heart muscle (B) Liver (C) Lungs (D) Brain. D