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English Translations » 生产及现场管理圈 » 【Production Version】Daily Question 20180205

【Production Version】Daily Question 20180205

2018-02-05View Original

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The strength grade of concrete is determined by the standard value of the compressive strength of cubes at an age of (　　), with a 95% confidence level. 　　A、3d, 7d, 28d 　　B、3d, 28d 　　C、7d, 28d 　　D、28d Correct answer: D
Reply #22018-02-05
The strength grade of concrete is determined by the standard value of the compressive strength of cubes at an age of (　　D, 28d　), with a 95% guarantee rate. 　

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Translated at 2026-07-21 05:25:15

Original: https://bbs.hcbbs.com/thread-1921366-1-1.html

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