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【单选题】已知 Sn 4+ /Sn 2+ =0.15V , Cu 2+ /Cu =0.34V , Fe 3+ /Fe 2+ =0.77V , Cl2/Cl - =1.36V 在标准状态下能自发进行的反应是
A.
Cl 2 +Sn 2+ ® 2Cl - +Sn 4+
B.
2Fe 2+ +Cu 2+ ® 2Fe 3+ +Cu
C.
2Fe 2+ +Sn 4+ ® 2Fe 3+ +Sn 2+
D.
2Fe 2+ +Sn 2+ ® 2Fe 3+ +Sn 4+
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【单选题】Boy:How do you like your new school? Girl:I’m feeling great in my mew school. There are many interesting subject here. ( ) What’s the girl’s attitude towards her new school life?
A.
Positive.
B.
Pressed
C.
Disappointed
D.
Negative.
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【简答题】词形填空。 1. How many ______ (teacher) are there in your school? 2. I have three _______( watch ). 3. There are some _______( orange) on the table. 4. Tom is a little _______ ( strong) than Mike. 5. I thi...
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【单选题】土壤速效钾含量的测定,采用的方法是( )。
A.
火焰光度计法
B.
比色法
C.
滴定法
D.
四分法
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【单选题】已知 φ 0 ( Fe 3+ /Fe 2+ ) = 0.77V , φ 0 ( Cu 2+ / Cu + ) = 0.15V , 则反应 Fe 3+ + Cu + D Fe 2+ + Cu 2+ 的平衡常数 K 为
A.
5.0 ´ 10 8
B.
1.0 ´ 10 8
C.
3.2 ´ 10 10
D.
5.0 ´ 10 10
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【判断题】原电池正极上发生氧化反应。
A.
正确
B.
错误
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【简答题】How many principles are there in subject-verb concord?
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【简答题】In the current economic downturn, many American schools are adding a new subject to the curriculum（课程）; financial literacy. One program in Virginia even gets students out of the classroom for a day to...
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【单选题】在锌-铜原电池中，锌电极 ( )
A.
负极，发生氧化反应
B.
负极，发生还原反应
C.
正极，发生氧化反应
D.
正极，发生还原反应
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【单选题】Boy:How do you like your new school? Girl:I’m feeling in my mew school. There are many interesting subject here. ( ) What’s the girl’s attitude towards her new school life?
A.
Positive.
B.
Pressed
C.
Disappointed
D.
Negative.
查看完整题目与答案
相关题目：
【单选题】已知 Sn 4+ /Sn 2+ =0.15V , Cu 2+ /Cu =0.34V , Fe 3+ /Fe 2+ =0.77V , Cl2/Cl - =1.36V 在标准状态下能自发进行的反应是
A.
Cl 2 +Sn 2+ ® 2Cl - +Sn 4+
B.
2Fe 2+ +Cu 2+ ® 2Fe 3+ +Cu
C.
2Fe 2+ +Sn 4+ ® 2Fe 3+ +Sn 2+
D.
2Fe 2+ +Sn 2+ ® 2Fe 3+ +Sn 4+
查看完整题目与答案
【单选题】Boy:How do you like your new school? Girl:I’m feeling great in my mew school. There are many interesting subject here. ( ) What’s the girl’s attitude towards her new school life?
A.
Positive.
B.
Pressed
C.
Disappointed
D.
Negative.
查看完整题目与答案
【简答题】词形填空。 1. How many ______ (teacher) are there in your school? 2. I have three _______( watch ). 3. There are some _______( orange) on the table. 4. Tom is a little _______ ( strong) than Mike. 5. I thi...
查看完整题目与答案
【单选题】土壤速效钾含量的测定,采用的方法是( )。
A.
火焰光度计法
B.
比色法
C.
滴定法
D.
四分法
查看完整题目与答案
【单选题】已知 φ 0 ( Fe 3+ /Fe 2+ ) = 0.77V , φ 0 ( Cu 2+ / Cu + ) = 0.15V , 则反应 Fe 3+ + Cu + D Fe 2+ + Cu 2+ 的平衡常数 K 为
A.
5.0 ´ 10 8
B.
1.0 ´ 10 8
C.
3.2 ´ 10 10
D.
5.0 ´ 10 10
查看完整题目与答案
【判断题】原电池正极上发生氧化反应。
A.
正确
B.
错误
查看完整题目与答案
【简答题】How many principles are there in subject-verb concord?
查看完整题目与答案
【简答题】In the current economic downturn, many American schools are adding a new subject to the curriculum（课程）; financial literacy. One program in Virginia even gets students out of the classroom for a day to...
查看完整题目与答案
【单选题】在锌-铜原电池中，锌电极 ( )
A.
负极，发生氧化反应
B.
负极，发生还原反应
C.
正极，发生氧化反应
D.
正极，发生还原反应
查看完整题目与答案
【单选题】Boy:How do you like your new school? Girl:I’m feeling in my mew school. There are many interesting subject here. ( ) What’s the girl’s attitude towards her new school life?
A.
Positive.
B.
Pressed
C.
Disappointed
D.
Negative.
查看完整题目与答案