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【简答题】
（2011年湖北宜昌，26题）小明和对蓝色的硫酸铜溶液很感兴趣，他们设计如下实验探究其相关性质并对反应后所得物质进行分析和处理。 ⑴我能写出其中两个不同基本反应类型的化学方程式：①________；②________。 ⑵实验完毕，小明和各自将三个反应所得到的物质混合、过滤，得到甲、无色溶液。小明取少量甲溶液于试管中，滴加紫色石蕊溶液，试管中溶液呈紫色。则甲溶液中一定含有的溶质是________(填化学式，下同)，可能含有的溶质是________或________。 对乙溶液进行了探究，发现乙溶液中含有氯化钾、硫酸钾和氢氧化钾。她说：我还能设计如下实验，在步骤①、②、③每次用一种无色溶液除去乙溶液中一种物质，且每有白色沉淀生成，最后得到纯净的硝酸钾晶体。 在步骤⑦中进行的操作是________，步骤③、⑥所加物质分别是________、________ (填化学式，下同)，固体E的成分有________。
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参考答案：
举一反三
【单选题】According to the girl, how many companies called her to have an interview within two weeks?
A.
11.
B.
17.
C.
21.
D.
27.
查看完整题目与答案
【单选题】In an attempt to improve the overall performance of clerical workers, many companies have introduced com- puterized performance monitoring and control systems (CPMCS) that record and report a worker’s...
A.
That workers with the highest productivity would also be the most accurate
B.
That workers who initially achieved high productivity ratings would continue to do so consistently
C.
That the highest performance ratings would be achieved by workers with the highest productivity
D.
That the most productive workers would be those whose supervisors claimed to value productivity
E.
That supervisors who claimed to value productivity would place equal value on customer satisfaction
查看完整题目与答案
【单选题】Many companies would prefer to employ people who have gained ______ experience for the work.
A.
practical
B.
suitable
C.
admirable
D.
actual
查看完整题目与答案
【单选题】她走到书架前,( )拿出一本书,看了起来
A.
随手
B.
路过
C.
分配
D.
得意
查看完整题目与答案
【判断题】工具面向线是指沿钻头轴线弯曲方向或钻头侧向力方向,并垂直于井眼轴线的方向线。
A.
正确
B.
错误
查看完整题目与答案
【单选题】轴系的纵向振动是指轴系在外力作用下，产生______的变形和振动。
A.
圆周方向
B.
轴线方向
C.
垂直方向
D.
横向
查看完整题目与答案
【单选题】It seems as if many Internet companies such as AT&T WorldNet and Yahoo ______.
A.
have jumped on some kinds of cars or trucks
B.
have begun their v-mail business operations
C.
have started to demonstrate to the public
D.
have begun their musical performance
查看完整题目与答案
【判断题】斜板桥的桥宽指垂直于桥轴线方向的桥宽。
A.
正确
B.
错误
查看完整题目与答案
【单选题】通过列车原则上应在( )办理。
A.
站线
B.
到发线
C.
岔线
D.
正线
查看完整题目与答案
【多选题】在财务评价中，盈利能力分析指标判别准则正确的是( )。
A.
Pt≤Pc
B.
FNPV≥0
C.
FIRR≤ic
D.
P't≥To
E.
FNPV＜0
查看完整题目与答案
相关题目：
【单选题】According to the girl, how many companies called her to have an interview within two weeks?
A.
11.
B.
17.
C.
21.
D.
27.
查看完整题目与答案
【单选题】In an attempt to improve the overall performance of clerical workers, many companies have introduced com- puterized performance monitoring and control systems (CPMCS) that record and report a worker’s...
A.
That workers with the highest productivity would also be the most accurate
B.
That workers who initially achieved high productivity ratings would continue to do so consistently
C.
That the highest performance ratings would be achieved by workers with the highest productivity
D.
That the most productive workers would be those whose supervisors claimed to value productivity
E.
That supervisors who claimed to value productivity would place equal value on customer satisfaction
查看完整题目与答案
【单选题】Many companies would prefer to employ people who have gained ______ experience for the work.
A.
practical
B.
suitable
C.
admirable
D.
actual
查看完整题目与答案
【单选题】她走到书架前,( )拿出一本书,看了起来
A.
随手
B.
路过
C.
分配
D.
得意
查看完整题目与答案
【判断题】工具面向线是指沿钻头轴线弯曲方向或钻头侧向力方向,并垂直于井眼轴线的方向线。
A.
正确
B.
错误
查看完整题目与答案
【单选题】轴系的纵向振动是指轴系在外力作用下，产生______的变形和振动。
A.
圆周方向
B.
轴线方向
C.
垂直方向
D.
横向
查看完整题目与答案
【单选题】It seems as if many Internet companies such as AT&T WorldNet and Yahoo ______.
A.
have jumped on some kinds of cars or trucks
B.
have begun their v-mail business operations
C.
have started to demonstrate to the public
D.
have begun their musical performance
查看完整题目与答案
【判断题】斜板桥的桥宽指垂直于桥轴线方向的桥宽。
A.
正确
B.
错误
查看完整题目与答案
【单选题】通过列车原则上应在( )办理。
A.
站线
B.
到发线
C.
岔线
D.
正线
查看完整题目与答案
【多选题】在财务评价中，盈利能力分析指标判别准则正确的是( )。
A.
Pt≤Pc
B.
FNPV≥0
C.
FIRR≤ic
D.
P't≥To
E.
FNPV＜0
查看完整题目与答案
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