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【简答题】
(1)A、B两种物质H、N、O、Na中的任意三种元素组成的强电解质，A的水溶液呈碱性，B的水溶液呈酸性，请找出A、B可能的两种组合，要求A1的溶液中水的电离程度小于A2溶液中水的电离程度， B1溶液中水的电离程度小于B2溶液中水的电离程度。 ①写出化学式A1____，B2___； ②相同温度下，当A1、B1的物质的量浓度相等时，两溶液中水电离出的H + 的物质的量浓度之比为____； ③若B1、B2两溶液的pH =5，则两溶液中水电离的H + 的物质的量浓度之比为____。 (2)25℃时用Pt电极电解500 mLa mol/L CuSO 4 溶液，试回答下列有关问题： ①写出阳极的电极反应式：____________________； ②当电解到C(Cu 2+ )为0.5 a mol/L时，停止电解，若要使溶液恢复到与电解前相同的状态，可向溶液中加入适量的____。 A．CuSO 4 粉末 B．CuSO 4 ·5H 2 O C．CuO粉末 D．Cu(OH) 2
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参考答案：
举一反三
【简答题】企业物流成本控制的具体方法及原则
查看完整题目与答案
【单选题】732年,阿拉伯军队袭击图尔战役(铁锤马特),战败后撤回比利牛斯山以南,伊斯兰教向 的传播,遂到此为止。
A.
西方
B.
东方
C.
北方
查看完整题目与答案
【单选题】Why is the protagonist death given significance?
A.
Because he writes great stories depicting humanity
B.
Because of his reflection before his death
C.
Because of his depiction of humanity
D.
Because of his nobleness to his fellow soldier
查看完整题目与答案
【判断题】732年,阿拉伯军队袭击图尔战役(铁锤马特),战败后撤回比利牛斯山以南,伊斯兰教向南的传播,遂到此为止
A.
正确
B.
错误
查看完整题目与答案
【判断题】有税时MM理论认为公司的最优负债率是100%,此时公司价值最大。( )
A.
正确
B.
错误
查看完整题目与答案
【多选题】The clinical significance of he negative reactions of tuberculin test including
A.
Technical error or tuberculin failure
B.
The early stage of delayed allergic reaction
C.
No tuberculosis infection
D.
After BCG vaccination
E.
The false negative reactions were caused by the low immune  function or inhibition of the body
查看完整题目与答案
【判断题】有税时MM理论认为公司的最优负债率是100%，此时公司价值最大。（ ）
A.
正确
B.
错误
查看完整题目与答案
【单选题】Of great significance the nation-wide movement is ______ the Kampuchean people in their heroic struggle against the aggression of the Vietnamese.
A.
to support
B.
for supporting
C.
supporting
D.
of supporting
查看完整题目与答案
【单选题】Of great significance is the nation-wide movement ______ the Kampuchean people in their heroic struggle against the aggression of the Vietnamese.
A.
to support
B.
for supporting
C.
supporting
D.
of supporting
查看完整题目与答案
【单选题】According to the author, the real significance of health proposals is ______.
A.
to solve health problems
B.
to show that health care is cheap
C.
to provide insurance to the uninsured
D.
to treat health care in a realistic way
查看完整题目与答案
相关题目：
【简答题】企业物流成本控制的具体方法及原则
查看完整题目与答案
【单选题】732年,阿拉伯军队袭击图尔战役(铁锤马特),战败后撤回比利牛斯山以南,伊斯兰教向 的传播,遂到此为止。
A.
西方
B.
东方
C.
北方
查看完整题目与答案
【单选题】Why is the protagonist death given significance?
A.
Because he writes great stories depicting humanity
B.
Because of his reflection before his death
C.
Because of his depiction of humanity
D.
Because of his nobleness to his fellow soldier
查看完整题目与答案
【判断题】732年,阿拉伯军队袭击图尔战役(铁锤马特),战败后撤回比利牛斯山以南,伊斯兰教向南的传播,遂到此为止
A.
正确
B.
错误
查看完整题目与答案
【判断题】有税时MM理论认为公司的最优负债率是100%,此时公司价值最大。( )
A.
正确
B.
错误
查看完整题目与答案
【多选题】The clinical significance of he negative reactions of tuberculin test including
A.
Technical error or tuberculin failure
B.
The early stage of delayed allergic reaction
C.
No tuberculosis infection
D.
After BCG vaccination
E.
The false negative reactions were caused by the low immune  function or inhibition of the body
查看完整题目与答案
【判断题】有税时MM理论认为公司的最优负债率是100%，此时公司价值最大。（ ）
A.
正确
B.
错误
查看完整题目与答案
【单选题】Of great significance the nation-wide movement is ______ the Kampuchean people in their heroic struggle against the aggression of the Vietnamese.
A.
to support
B.
for supporting
C.
supporting
D.
of supporting
查看完整题目与答案
【单选题】Of great significance is the nation-wide movement ______ the Kampuchean people in their heroic struggle against the aggression of the Vietnamese.
A.
to support
B.
for supporting
C.
supporting
D.
of supporting
查看完整题目与答案
【单选题】According to the author, the real significance of health proposals is ______.
A.
to solve health problems
B.
to show that health care is cheap
C.
to provide insurance to the uninsured
D.
to treat health care in a realistic way
查看完整题目与答案
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