非水碱量法测定盐酸氢丙嗪
A．加Ba(Ac)2B．加Hg(Ac)2处理C．直接滴定D．加HgCl2处理E．电位法指示终点
参考答案：B
采暖管道冲洗完毕后应通水、（），进行试运行和调试。
A.压力试验
B.灌水试验
C.通球试验
D.加热
When you get your paper back, pay special attention to _______ have been marked. [ ]
A. where
B. which
C. what
D. that
arked. [ ]