测定氯离子的方法常用的有（）。
A.佛尔哈德法
B.莫尔法
C.汞量法
D.靛蓝二磺酸钠比色法
参考答案：A, B, C
— Where are Jack and Mike?
— They ____ the furniture you asked for into thehouse. [ ]
A. have been carrying
B. carried
C. have been carried
D. were carried
每100ml硫酸铜溶液测定Hb血滴不能多于：（）
A.50滴
B.60滴
C.80滴
D.100滴
