皮皮学，免费搜题
登录
搜题
【简答题】
现有一包白色粉末，已知它们可能由Na 2 SO 4 、NaCl、Na 2 CO 3 、CuSO 4 中的一种或几种组成，某学生的实验过程记录如下： 试回答： （1）白色沉淀A的化学式为______，无色气体D的化学式为______． （2）由上述实验记录推断：原固体一定含有______，一定不含有______，可能含有______． （3）请你设计实验方案，验证上述可能含有的物质是否一定存在（写出具体操作步骤、现象和结论）______．
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【单选题】货物运单记载件数发生涂改 ,托运人未盖章,到站实际卸车具体件数与更改数相符应( )
A.
编制普通记录
B.
在运单 “承运人记载事项栏”内注明
C.
不编记录
D.
编制货运记录
查看完整题目与答案
【单选题】货物运单记载件数发生涂改,托运人未盖章,到站实际卸车具体件数与更改数相符。应( )。 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
编制普通记录
B.
在运单 “ 承运人记载事项栏 ” 内注明 prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
C.
不编记录
D.
编制货运记录
查看完整题目与答案
【简答题】请注意一定写出完整单词。(包括已给出的首字母) Dave: Hello, Peter. Have you noticed that some people are not so healthy as before though life has improved a lot. Peters Yes. It’s true. Nowadays some people eat more, so they...
查看完整题目与答案
【简答题】When you ask how someone is, basically you may use “______________?”
查看完整题目与答案
【单选题】货物运单记载件数发生涂改，托运人未盖章，到站实际卸车具体件数与更改数相符，应（）。
A.
编制普通记录
B.
编制货运记录
C.
不编记录
D.
在运单“承运人记载事项栏”内注明
查看完整题目与答案
【简答题】Other places do have enough water. But these places are not always wise about using water. People waste water. They water yards and golf courses too much. They water at the wrong time in hot weather. ...
查看完整题目与答案
【单选题】When asked why he enjoys rock climbing so much,Bibby said,'It's basically like dancing on the rock. It's a challenge________man against nature.' [    ]
A.
of
B.
for
C.
by
D.
over
查看完整题目与答案
【单选题】One of the reasons why some people are not in favor of fairy tales is that______.
A.
they are full of imagination
B.
they are just invented stories which are far from the truth
C.
they are not interesting
D.
they make teachers of history difficult to teach
查看完整题目与答案
【简答题】Swimming is very popular. People like swimming in summer because water makes people feel cool. If you like swimming and swim in a wrong place, it may not be safe. These years, a lot of people died whe...
查看完整题目与答案
【简答题】Nowadays, many people like going travelling for a holiday.Traveling is really fun.But some people are not careful with their things.They often leave their things at the airport or the station,such as ...
查看完整题目与答案
相关题目：
【单选题】货物运单记载件数发生涂改 ,托运人未盖章,到站实际卸车具体件数与更改数相符应( )
A.
编制普通记录
B.
在运单 “承运人记载事项栏”内注明
C.
不编记录
D.
编制货运记录
查看完整题目与答案
【单选题】货物运单记载件数发生涂改,托运人未盖章,到站实际卸车具体件数与更改数相符。应( )。 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
编制普通记录
B.
在运单 “ 承运人记载事项栏 ” 内注明 prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
C.
不编记录
D.
编制货运记录
查看完整题目与答案
【简答题】请注意一定写出完整单词。(包括已给出的首字母) Dave: Hello, Peter. Have you noticed that some people are not so healthy as before though life has improved a lot. Peters Yes. It’s true. Nowadays some people eat more, so they...
查看完整题目与答案
【简答题】When you ask how someone is, basically you may use “______________?”
查看完整题目与答案
【单选题】货物运单记载件数发生涂改，托运人未盖章，到站实际卸车具体件数与更改数相符，应（）。
A.
编制普通记录
B.
编制货运记录
C.
不编记录
D.
在运单“承运人记载事项栏”内注明
查看完整题目与答案
【简答题】Other places do have enough water. But these places are not always wise about using water. People waste water. They water yards and golf courses too much. They water at the wrong time in hot weather. ...
查看完整题目与答案
【单选题】When asked why he enjoys rock climbing so much,Bibby said,'It's basically like dancing on the rock. It's a challenge________man against nature.' [    ]
A.
of
B.
for
C.
by
D.
over
查看完整题目与答案
【单选题】One of the reasons why some people are not in favor of fairy tales is that______.
A.
they are full of imagination
B.
they are just invented stories which are far from the truth
C.
they are not interesting
D.
they make teachers of history difficult to teach
查看完整题目与答案
【简答题】Swimming is very popular. People like swimming in summer because water makes people feel cool. If you like swimming and swim in a wrong place, it may not be safe. These years, a lot of people died whe...
查看完整题目与答案
【简答题】Nowadays, many people like going travelling for a holiday.Traveling is really fun.But some people are not careful with their things.They often leave their things at the airport or the station,such as ...
查看完整题目与答案