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【单选题】
络合滴定中,指示剂的封闭现象是由( )引起的A.
指示剂与金属离子生成的络合物不稳定
B.
被测溶液的酸度过高
C.
指示剂与金属离子生成的络合物稳定性大于 MY 的稳定性
D.
指示剂与金属离子生成的络合物稳定性小于 MY 的稳定性
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皮皮学刷刷变学霸
举一反三
【简答题】电流是一个______量,电流的方向只表明电荷的_______________方向。
【单选题】— She is too busy to help us finish the work. — Let's do it _____. [ ]
A.
herself
B.
myself
C.
yourselves
D.
ourselves
【单选题】—They are too busy to help us finish the work. —Let's do it ________. [ ]
A.
herself
B.
myself
C.
ourselves
D.
itself
【简答题】第3章 水文频率计算时,水文学的基本资料,必须满足( )、( )、( )、( )和( )。
【单选题】— He is too busy to help us finish the work. — Let's do it _____. [ ]
A.
itself
B.
myself
C.
ourselves
D.
himself
【简答题】Let us finish the discussion of the contract conditions.
【简答题】语法填空 If we want to finish anything in life, let us not forget that we must persevere（坚持不懈）. If we want to learn 1 lessons well in school, we must be hard- working and not give up 2 we come to anything...
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