【Daily Question 2019】Hydrogen production and hydrogenation section – Questions No. 5-22

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【Daily Question 2019】Hydrogen production and hydrogenation section – Question No. 5-22: A blind plate can be installed at ( ). A. During the production process B. Before all the material has been removed C. After all the material has been removed D. During the process of removing the material. Those who provide the correct answer will receive 1 point; those who are correct will receive an additional 2 points. Those who give incorrect answers will not receive any points. Please have the person in charge update the score for the question setter as soon as possible. Temporarily, the top 60 players will receive +1 to automatic wealth acquisition. 3 correct for wealth, 1 incorrect for wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below