亚硝酸钠滴定法测定时,一般均加入溴化钾,其目的是()
A.使终点变色明显
B.使氨基游离
C.增加NO+的浓度
D.增强药物碱性
E.增加离子强度
参考答案:C
You have learned the poem by heart all right, but it doesn’t ____ mean that you have fully understood its meaning.
A.necessarily
B.simply
C.essentially
D.purposefully.
城市轨道交通基本建设程序中,属于投资阶段的有()。
A.工程勘察设计
B.工程施工
C.试运行
D.试运营
E.竣工验收