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【单选题】
已知 lgK BiY = 27.9 , lgK ( FeY - ) = 25.1 , lgK ( FeY 2- ) =14.3 。欲用 EDTA 测定 Fe 3+ , Bi 3+ 混合溶液中 Bi 3+ 。消除 Fe 3+ 的干扰应采用的方法是( )
A.
配位掩蔽
B.
调节酸度
C.
将 Fe 3+ 变成 Fe(OH) 3 沉淀分离
D.
氧化还原掩蔽
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【判断题】现行的《中华人民共和国商标法》颁布于1982年
A.
正确
B.
错误
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【单选题】At first,he doubted my honesty but at last he .A.smooths away itB.smooths it awayC.smoothed it aw
A.
At first,he doubted my honesty but at last he____. A.smooths away it
B.
smooths it away
C.
smoothed it away
D.
smoothed away it
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【单选题】He doubted _____ it was true.
A.
that
B.
as if
C.
if
D.
as though
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【简答题】rat ox tiger rooster goat snake
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【单选题】He doubted______ it was true.
A.
if
B.
that
C.
as though
D.
as if
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【简答题】给下列单词分类。 cashier clerk fifty duck goat gym shop elephant library sixty tiger waitress wolf restaurant pig kangaroo 职业: 数字: 场所: 动物:
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【判断题】Goat and Tiger babies are not Chinese parents’ first choice.
A.
正确
B.
错误
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【简答题】分类。 cashier clerk fifty duck goat gym shop elephant library sixty tiger waitress wolf restaurant pig kangaroo 1. 职业: 2. 数字: 3. 场所: 4. 动物:
查看完整题目与答案
【单选题】What doesn't have fur? [ ]
A.
Goat.
B.
Tiger.
C.
Snake.
D.
Cat.
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【简答题】给下列单词分类。 five, duck, goat, one, two, elephant, six, tiger, wolf, pig, kangaroo, nine 1. 数字: ________________________________________ 2. 动物: ________________________________________
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相关题目:
【判断题】现行的《中华人民共和国商标法》颁布于1982年
A.
正确
B.
错误
查看完整题目与答案
【单选题】At first,he doubted my honesty but at last he .A.smooths away itB.smooths it awayC.smoothed it aw
A.
At first,he doubted my honesty but at last he____. A.smooths away it
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C.
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【单选题】He doubted _____ it was true.
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B.
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D.
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【简答题】rat ox tiger rooster goat snake
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【单选题】He doubted______ it was true.
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that
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【简答题】给下列单词分类。 cashier clerk fifty duck goat gym shop elephant library sixty tiger waitress wolf restaurant pig kangaroo 职业: 数字: 场所: 动物:
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【判断题】Goat and Tiger babies are not Chinese parents’ first choice.
A.
正确
B.
错误
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【简答题】分类。 cashier clerk fifty duck goat gym shop elephant library sixty tiger waitress wolf restaurant pig kangaroo 1. 职业: 2. 数字: 3. 场所: 4. 动物:
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【单选题】What doesn't have fur? [ ]
A.
Goat.
B.
Tiger.
C.
Snake.
D.
Cat.
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【简答题】给下列单词分类。 five, duck, goat, one, two, elephant, six, tiger, wolf, pig, kangaroo, nine 1. 数字: ________________________________________ 2. 动物: ________________________________________
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