2026年知到答案 Weldability of Metals and Alloys金属焊接性 最新知到智慧树满分章节测试答案
第一章 单元测试
1、 问题:With carbon equivalent ( ), the steel has a low tendency to harden and cold cracking?
选项:
A:less than 0.40%
B:less than 0.50%
C:less than 0.60%
D:less than 0.80%
答案: 【
less than 0.40%
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