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One question per day; no prize for correct answers, it’s mainly for entertainment

2019-12-21View Original

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49. () refers to the ability of a metal to undergo permanent deformation without breaking under external forces. ?A. Plasticity B. Toughness C. Elasticity. Question from yesterday: C. 48. In the heat assembly of couplings, if there are no specific technical requirements, the maximum temperature allowed for flame heating shall not exceed (). ? A、200℃B、300℃C、400℃

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