问道拉伸实验的题~~A tensile test uses a test specimen that has a gage length of 50 mm and an area = 200 mm2. During the test the specimen yields under a load of 98,000 N. The corresponding gage length = 50.23 mm. This is the 0.2 percent yield

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问道拉伸实验的题~~A tensile test uses a test specimen that has a gage length of 50 mm and an area = 200 mm2. During the test the specimen yields under a load of 98,000 N. The corresponding gage length = 50.23 mm. This is the 0.2 percent yield
问道拉伸实验的题~~
A tensile test uses a test specimen that has a gage length of 50 mm and an area = 200 mm2. During the test the specimen yields under a load of 98,000 N. The corresponding gage length = 50.23 mm. This is the 0.2 percent yield point. The maximum load = 168,000 N is reached at a gage length = 64.2 mm.
(a) Determine yield strength Y,
450 MPa
468 MPa
490 MPa
520 MPa
(b) Determine modulus of elasticity E
188.5 x 10^3 MPa
124.8 x 10^2 MPa
1885.0 x 10^3 MPa
1248.0 x 10^2 MPa

问道拉伸实验的题~~A tensile test uses a test specimen that has a gage length of 50 mm and an area = 200 mm2. During the test the specimen yields under a load of 98,000 N. The corresponding gage length = 50.23 mm. This is the 0.2 percent yield 英语中名词作定语修饰名词时能不能用复数?在科技写作中,遇见了这样的问题.我说“拉伸实验结果”：tensile tests results被审稿人告知这属于基本语法错误,应该是 tensile test results,即便是很多问道立体几何的题问道三角函数的题, 什么是原位拉伸实验低碳钢拉伸经典实验中,拉伸试样的四个变形阶段是那四个? 金属拉伸实验再采用国标228拉伸低碳钢（铁卷）时,拉伸试验机该采用多大的拉伸速度,速度对哪些参数有影响. 问道题! 金属材料的拉伸实验中如何观察低碳钢的屈服点铸铁和低碳钢在拉伸时的力学性能材料力学实验无锡什么地方可以测金属的拉伸,弯曲,冲击实验低碳钢拉伸实验的过程分为哪三个阶段? 拉伸法测杨氏模量的物理实验方法有哪些拉伸破坏实验所确定的材料力学性能数据有何实用价值?（低碳钢、铸铁的拉伸实验）问道幂级数求收敛半径的题问道幂级数求收敛半径的题在材料拉伸实验中,我用的引伸计标距为50mm能否测量拉伸试样标距比引伸计小的拉伸试样,例如25mm标距. 还有高中数学高手在线吗问道题在的说一下问道题