A、B、C和D四种材料,其拉伸时的应力应变曲线分别如图5-14所示,问:强度最高的材 发布时间:2017-02-06 14:31 │ 来源:www.tikuol.com 题型:单项选择题 问题: A、B、C和D四种材料,其拉伸时的应力应变曲线分别如图5-14所示,问:强度最高的材料是().A.AB.BC.CD.D
题型:单项选择题 The Anti-Japanese War ________ in 1937 and it _______ eight years. A.was broken out; lastedB.broke out; lastedC.break out; lastsD.broke out; last 查看答案