离子选择电极-流动注射法测定水中硝酸盐氮时,钙离子、镁离子干扰测定。
参考答案:错
解析:离子选择电极-流动注射法测定水中硝酸盐氮时,钙离子、镁离子不干扰测定。
— I was told you spoke ill of me in my absence.
— I said it. ______? [ ]
A. How come
B. So what
C. What for
D. Why not
钻井液形成泥饼性能最好是()。
A.低失水量和薄而致密
B.疏松
C.越厚越好
D.高失水量