【Daily Question No. 074】2017.09.19

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This post was last edited by liuquan1100 on 2017-9-19 09:50. [Daily Question No. 074] 2017.09.19: If the surface of the skin ( ), it will stick to the surface of a cold object when in contact with it. Fill in the blanks; the reference answers will be visible after responding, and points can be earned 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 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) [Daily Question No. 066] September 11, 2017: Leakage protection devices are mainly used to prevent electric shock accidents caused by electrical leakage or single-phase electric shock incidents. Regarding 【Daily Question No. 067】, September 12, 2017: Water cannot be used to extinguish a fire caused by calcium carbide. Regarding 【Daily Question No. 068】, on September 13, 2017, explosion-proof tools should be used for routine maintenance in LNG vaporization stations. Regarding 【Daily Question No. 069】, dated September 14, 2017: Carbon dioxide fire extinguishers contain liquid carbon dioxide, and the principle behind their fire-extinguishing action is mainly due to the （ ） effect. Suffocation [Daily Question No. 070] September 15, 2017. Labor protection refers to the various protective measures taken to ensure the safety and health of workers during the work process. Regarding 【Question of the Day No. 071】, dated September 16, 2017: When low-temperature gases or liquids enter pipelines at normal temperature, it will cause ( ) in those pipelines. Cracking 【Daily Question No. 072】 September 17, 2017 LNG vapor is also harmful to the human body. As the concentration of LNG vapor in the air increases, the air concentration, that is, the oxygen concentration, decreases. When it drops to a certain level, it can cause harm to humans. Suffocation 【Daily Question No. 073】 September 18, 2017: When selecting a fuse, it is necessary to choose an appropriate one based on the current level in the circuit; other metals cannot be used as substitutes. (A) Wire made of iron (B) Wire made of copper (C) Wire made of aluminum (D) Wire made of lead D