大家好，我是小生，我来为大家解答以上问题。Elasticity modulus，elasticity很多人还不知道，现在让我们一起来看看吧！

1、elasticity is the ratio of the proportional change in one variable with respect to proportional change in another variable. Price elasticity, for example, is the sensitivity of quantity demanded or supplied to changes in prices. Elasticity is usually expressed as a negative number but shown as a positive percentage value.。

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