硝酸汞滴定法测定水样中氯化物，属于下列哪种滴定法（）。
A.酸碱滴定法
B.络合滴定法
C.氧化还原滴定法
D.沉淀滴定法
E.电位滴定法
参考答案：B
I will see many places of ______ from all over the world. [ ]
A. interest
B. interesting
C. interested
D. more interesting
—Do you know where David is? I couldn’t find him anywhere.
—Well . He have gone far-his coat’s still here.[ ]
A. shouldn’t
B. mustn’t
C. can’t
D. wouldn’t
