根据图示三种材料拉伸时的应力-应变曲线,得出如下四种结论,请判断哪一个是正确的 ( )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/49ff599ea8544b5881252450d181bb64.png
举一反三
- 根据图示三种材料拉伸时的应力-应变曲线,得出如下四种结论,请判断哪一个是正确的 ...81252450d181bb64.png
- 根据图示三种材料拉伸时的应力-应变曲线,得出如下四种结论,请判断哪一个是正确的 ( )。[img=304x279]17a3d991d67fd64.png[/img]
- 根据图示三种材料拉伸时的应力-应变曲线,得出的如下四种结论,请判断哪一种是正确的()。 A: A B: B C: C D: D
- 关于斜弯曲的主要特征有四种答案,试判断哪一种是正确的。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/42375925fb1245cebbfabe4a5cde4d5a.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/6055f7367a0b466581761cb41cf73e10.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/a028bfcdbbcc4cb592fb6cd9d78b736a.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/6abdbfbb54644603b4269b938e091af5.png" />
- 图示螺钉在拉力F作用下。已知材料的剪切许用应力[τ]和拉伸许用应力[σ]之间的关系为:[τ]=0.6[σ]。试求螺钉直径d与钉头高度h的合理比值。<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/ea5aac2943c148f0898270443ef13de6.png" /> A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/aa9810483bad40828ce87767240d1292.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/020a3681565242b99d12bf523efb96ad.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/337cbe73f1c7414b888c54365465b39d.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/eb5408a49bfd47db91aaf04e7780d90c.png" />