【Daily Question】9.15 Reply +2； To +3

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This post was last edited by ren6602121 on 2015-9-16 08:16. In order to increase the popularity of the container section, the \"One Question per Day\" activity was launched under the guidance of the leaders, aiming to foster active technical exchanges while also providing financial rewards to users. The wall temperature of the heat exchange tube should be set to D. A) Average temperature of the fluid inside the tube B) Average temperature of the fluid outside the tube C) Average temperature of the fluids on both the inside and outside sides D) Average temperature of the metal surrounding the heat exchange tube. Reply with the answer you think is correct; participating in the quiz earns +1 wealth point (points are added automatically according to the rules; no additional points or comments will be given if your answer is incorrect). +3 additional wealth points will be awarded if all answers are correct. Extra points will also be given for providing a detailed explanation or analysis of the questions and answers. If your answer is correct and your explanation is accurate, it will be marked as the best reply (the best assistance). Feel free to answer; please do not reply repeatedly ； If a, b, c, and d are all correct, choose e; answering a, b, c, d, e will result in no points. Note: We will close this post after 24 hours to reveal the answers and explanations, as well as the best response (the best help). Attraction Reward: If you post a topic in this section within two days to provide a detailed explanation of the knowledge points covered in this question, please reply to this post to inform us, and we will ask a moderator to grant +Attraction. 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 and opinions. After registration, we will rank participants based on the content of their posts: the last-place participant will receive +1 charm point, the second-to-last +2 charm points, and so on, with the highest score earning +5 charm points. http://bbs.hcbbs.com/thread-1381938-1-1.html Inviting friends to join earns wealth. http://bbs.hcbbs.com/thread-1389197-1-1.html Seeking sponsorships from manufacturers