Ammonia, one of the earliest known nitrogen compounds, was originally produced by dis-tilling organic materials.

admin2012-07-29  74

问题 Ammonia, one of the earliest known nitrogen compounds, was originally produced by dis-tilling organic materials.

选项 A、masses
B、fabrics
C、substances
D、liquids

答案C

解析 物质
转载请注明原文地址:https://jikaoti.com/ti/RsgsFFFM
0

随机试题
最新回复(0)