高考易混词：quality 与quantity
★ quality
① n.质;质量
goods of poor quality /poor - quality goods 劣质货物
improve the quality of life 改善生活质量
This model is of good/ high quality, but it 's too expensive.这个型号质量好，但太贵。2011湖北卷
② 品质;品德[常用复数]:
the quality of honest诚实的品性
What qualities does a great person have?
伟人具有什么样的品德?
③ 优质
products of quality 优质产品
★ quantity n.数量;大量
The change of quantity causes the change of quality.
量变引起质变。
a large quantity of/ large quantities of
大量的（既可以接可数名词也可以接不可数名词）
There’s a large quantity of rain in this area.这个地区雨量大。
