低碳钢材料在拉伸实验过程中,不发生明显的塑性变形时,承受的最大应力应当小于的数值是( 发布时间:2018-08-14 05:48 │ 来源:www.tikuol.com 题型:单项选择题 问题: 低碳钢材料在拉伸实验过程中,不发生明显的塑性变形时,承受的最大应力应当小于的数值是()A.比例极限B.屈服极限C.强度极限D.许用应力
题型:单项选择题 Which of the following is NOT true according to the passage().A.Andrew Carnegie became the wealthiest men in America by his hard work.B.Andrew Carnegie’s noteworthy contributions to society are those that bear his name.C.Most Americans have benefited from Andrew Carnegie’s generosity.D.Libraries donated by Andrew Carnegie formed the basis of the public library system. 查看答案