【Daily Topic】【Civil Engineering Version 20160107】

2016-01-07View Original

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Participation reward: 2 Wealth. Reward for correct answer: 9 wealth. Among the chemical compositions of the following steels, which one is considered a harmful element in carbon steel? () 　　A. Carbon > B. Silicon C. Manganese D. Phosphorus Answer: D. Phosphorus

Reply #22016-01-07

D. Phosphorus. -------------------------------------

Reply #32016-01-07

D. Phosphorus~~~~~~~~~~~~~~~~

Reply #42016-01-07

Among the chemical components of the following steels, the harmful element in carbon steel is (D, phosphorus).

Reply #52016-01-07

Among the chemical compositions of the following steels, the element that belongs to the harmful elements in carbon steel is (D). 　　A. Carbon B. Silicon C. Manganese D. Phosphorus

Reply #62016-01-07

Among the chemical compositions of the following steels, the element that belongs to the harmful elements in carbon steel is (D). 　　A. Carbon > B. Silicon C. Manganese D. Phosphorus

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【Daily Topic】【Civil Engineering Version 20160107】

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