【Daily Question】10.31.2015 (1 wealth point for replying, plus 3–8 additional wealth points for a correct answer)

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This post was last edited by WQC on 10/31/2015 at 10:24. The Mechanical Section has introduced the \"Question of the Day\" feature, which not only helps to foster an active atmosphere for technical discussions and guide the direction of such exchanges but also provides users with financial rewards, enabling them to experience various cool features. Single-choice question: The butter used in lubricants belongs to ( ). A. Lubricating oil, B. Grease, C. Solid lubricant, D. Liquid lubricant. Answer: Please note: We will close this thread after 24 hours, and at that time we will announce the best response (the most helpful answer), along with the answer and explanation. Charisma Reward: If you post a topic in this section within two days to provide a detailed explanation or discussion of the knowledge points related to this question, please reply or leave a comment in this post to inform us, and we will have a moderator award you charisma points. It is not allowed to simply copy and paste; original content is preferred, with at least some organization by the user along with personal insights. After registration, we will rank based on the content of the posts: the last-place contestant will receive +1 charm, the second-to-last +2 charm, and so on, with the highest score getting +5 charm.