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【单选题】
以铁铵矾为指示剂，用返滴法以NH4CNS标准溶液滴定Cl-时，下列错误的是A.
以铁铵矾为指示剂，用返滴法以 NH4CNS 标准溶液滴定 Cl- 时，下列错误的是
B.
滴定前将 AgCl 沉淀滤去
C.
滴定前加入硝基苯，并振摇
D.
中性溶液中测定，以防 Ag2O 析出
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【简答题】听1段材料，回答第1小题。 1. Why did George go to see the doctor? [ ] A. Because he was ill. B. Because his mother was ill. C. Because the doctor was his friend.
【简答题】在进行建设工程项目总进度目标控制前，首先应（ ）。
【简答题】在进行建设工程项目总进度目标控制前，首先应（ ）。
【单选题】Why did John go to see a doctor?
A.
Because he broke his leg.
B.
Because he had a high fever.
C.
Because he had a headache.
D.
Because he couldn’t sleep at night.
【简答题】在进行建设工程项目总进度目标控制前，首先应（ ）。
【单选题】Why did he go to see a bunch of strangers to go camping together? (两个绝招帮你找到人生使命)
A.
He likes camping.
B.
They are his close friends.
C.
He would intend to do something he is sick of.
D.
That is the purpose of his life.
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