能准确滴定金属离子的条件是（Et<= 0.1%） （ ）
A. KMY≥106
B. K/MY≥106
C. cKMY≥106
D. cK/MY≥106
查看答案
在配位滴定中，须使溶液的酸度比测定该离子所允许的最高酸度要高。（ ）
A. 对
B. 错
Why does Bob stand by the doorway in Scene 1?
A. He is looking for a criminal.
B.It is the doorway to his home.
C.He is waiting for his old friend.
D.He is a police officer and is just checking the area.
Why does Miles hide his face in Scene 2?
A. He is scared of Bob.
B.He has a terrible facial injury.
C.He wants Bob to think he is Jimmy.
D.He knows Bob would be scared of him.
Why doesn't Jimmy arrest Bob according to Scene 3?
A. Jimmy is also a criminal.
B.Miles wants to arrest Bob.
C.He knows Bob is stronger than him.
D.He doesn’t want to arrest an old friend.
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