题目内容

铬酸钾法测定氯化钠的含量

A. 基准氯化钠
B. 乙二胺介质
C. PH值6.5~10.5
D. 强酸性介质(HN03)
E. PH L0.0

查看答案
更多问题

Drilling oil wells was______work that he couldnt finish it by himself.

A. such difficult
B. such a difficult
C. so difficult a
D. so difficult

分析国内铜的供给时,必须关注期初库存量,当期产量,当期进口量、TC/RC等数据。()

价格、持仓量和成交量三者之间关系属于持仓量研究的方向。()

Zhou Qiren, a professor in Beijing University, believed that business in the market economy must______the right balance between their pursuit of profits and the needs of customers.

A. regain
B. assume
C. strike
D. decline

答案查题题库