衡量材料抵抗变形能力的指标是（）；衡量材料轻质高强性能的指标（）是（）。
参考答案：弹性模量；比强度
— How is the weather? — It's _________.[ ]
A. cool and sunny
B. rain
C. sun
New York is referred to as a melting-pot because its citizens come from cultures.
A．adverse
B．diligent
C．diverse
D．domestic
