Pure feldspar is a colorless, transparent mineral, but impurities commonly make it opaque and colorful.

admin2012-07-29 34

问题 Pure feldspar is a colorless, transparent mineral, but impurities commonly make it opaque and colorful.

选项 A、truly
B、rapidly
C、periodically
D、frequently

答案D

解析通常地

转载请注明原文地址:https://jikaoti.com/ti/YiqsFFFM

职称英语卫生类C级

相关试题推荐

随机试题

最新回复(0)