Instruments: [Daily Question] February 24, 2011

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This post was last edited by cnooczhouyx on 2011-2-25 at 15:18. [Daily Question] Question for February 24, 2011: 1. In a signal alarm system, its basic operating states include ( ) A. Normal state, alarm state, confirmation state; B. Normal state, alarm state, test state; C. Normal state, alarm state, reset state; D. All of the above. 2. In the logical control of signal alarm interlock systems, the methods used to express logic include ( ) A. Logical expressions, truth tables, logical symbols; B. Logical expressions, truth tables, logical diagrams; C. Logical expressions, logical symbols, geometric lines; D. All of the above. Note: 1) The top 50 participants will definitely receive a reward. No additional points will be given beyond 50 participants. Among them, the first 20 who answer correctly will receive a “Wealth 5” award, while those from 21st to 50th will get a participation award. Those who answer correctly receive 3 points, and those who answer incorrectly receive 2 points； Points may be awarded additionally for detailed analysis, in-depth discussion, and discretion ； 2) Please hide your replies; the method for doing this is at http://bbs.hcbbs.com/thread-492556-1-1.html. Do not edit the replies after posting them. (No rewards will be given for any replies that are not hidden. ) 3) Posts that expire will be closed, and the answers will become visible after the post is closed ； Thank you all for your participation ； 【Daily Question】Answer for February 24, 2011: 1. D 2. D.