拉伸实验能显示出金属材料在弹性变形和塑性变形时应力与（）的关系。
参考答案：应变
选择合适的词填空。
道 座 面 股 束 阵
一( )清泉 一( )镜子 一( )微风
一( )水塔 一( )杜鹃花 一( )石缝
An aneroid barometer is an instrument（）.
A.used to measure the speed of wind
B.in which the pressure of air is measured
C.that tells which dirction a storm is coming from
D.used to measure the height of waves
