The detailed comparison shown that secant modulus ratio isn't constant, this phenomenon is exist even though at the quasi-elastic deformation phase.
详细的比较表明，在不同的变形阶段，两者割线模量之比并非常数，即使是在准弹性变形阶段，也存在这一现象。
The constant ratio of elongation and tensile force is elastic modulus;
弹性的综合测试与剩余伸长、张力和延伸率有关；
The constant ratio of elongation and tensile force is elastic modulus;
弹性的综合测试与剩余伸长、张力和延伸率有关；
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