皮皮学，免费搜题
登录
搜题
【单选题】
常温下体积相同的下列四种溶液：①pH=3的盐酸 ②pH=3的醋酸溶液 ③pH=11的氨水 ④pH=11的NaOH溶液。下列说法中，正确的是
A.
②和④混合，所得混合溶液的pH大于7
B.
将四种溶液分别稀释到体积为原的100倍，溶液pH大小顺序③>④>②>①
C.
③和④分别与足量稀硫酸中和，消耗硫酸的体积③=④
D.
①和③混合，所得混合溶液中c（H + ）+ c（NH 4 + ）=c（Cl － ）+c（OH － ）
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
【简答题】关于道路竖曲线，正确的有() A竖曲线因坡段转折处是凸形或凹形的不同而分为凸形竖曲线和凹形竖曲线两种; B为转折角，其大小等于两相交坡段线的倾斜角之差; C值为正，变坡点在曲线上方;为负，变坡点在曲线下方; D凸形竖曲线设置的目的在于缓和纵坡转折线，保证汽车的行驶视距。
查看完整题目与答案
【单选题】The result and manifestation of vertical differentiation of organizational structure are organizational structure ()
A.
Department
B.
Hierarchy
C.
F unctionalization
D.
Specialization.
查看完整题目与答案
【单选题】what does "exhort" mean ? Kennedy exhorted his listeners to turn away from violence.
A.
advise
B.
tell
C.
make
D.
get
查看完整题目与答案
【单选题】听力原文： Although I think the United States generally has an excellent system of transportation, I do not think that it does a good job of transporting people between cities that are only a few hundred m...
A.
Energy conservation.
B.
Transportation of the future.
C.
Strip cities.
D.
Advantages of air transportation over railroads.
查看完整题目与答案
【简答题】导游交际语言是导游人员与游客交往时的一种语言形式, 它主要包括哪些形式?
查看完整题目与答案
【单选题】— What are you ______________? — I'm listening to the music. [     ]
A.
do
B.
doing
C.
does
查看完整题目与答案
【多选题】关于道路竖曲线，正确的有（）
A.
竖曲线因坡段转折处是凸形或凹形的不同而分为凸形竖曲线和凹形竖曲线两种
B.
为转折角，其大小等于两相交坡段线的倾斜角之差
C.
值为正，变坡点在曲线上方；ω为负，变坡点在曲线下方
D.
凸形竖曲线设置的目的在于缓和纵坡转折线，保证汽车的行驶视距
查看完整题目与答案
【单选题】选定连续的单元格区域时,先单击区域的第一个单元格,再按住()键单击区域中的最后一个单元格
A.
Ctrl
B.
Shift
C.
Alt
查看完整题目与答案
【单选题】A survey was carried on the death rate of new-born babies in that region,___ were surprising. A. as result B. which results C. over D. the results of which
A.
1
B.
2
C.
3
D.
4
查看完整题目与答案
【单选题】A survey was crried out on the death rate of new-born babies in that region, were surprising. A. as result B. which results C. over D. the results of which
A.
1
B.
2
C.
3
D.
4
查看完整题目与答案
相关题目：
【简答题】关于道路竖曲线，正确的有() A竖曲线因坡段转折处是凸形或凹形的不同而分为凸形竖曲线和凹形竖曲线两种; B为转折角，其大小等于两相交坡段线的倾斜角之差; C值为正，变坡点在曲线上方;为负，变坡点在曲线下方; D凸形竖曲线设置的目的在于缓和纵坡转折线，保证汽车的行驶视距。
查看完整题目与答案
【单选题】The result and manifestation of vertical differentiation of organizational structure are organizational structure ()
A.
Department
B.
Hierarchy
C.
F unctionalization
D.
Specialization.
查看完整题目与答案
【单选题】what does "exhort" mean ? Kennedy exhorted his listeners to turn away from violence.
A.
advise
B.
tell
C.
make
D.
get
查看完整题目与答案
【单选题】听力原文： Although I think the United States generally has an excellent system of transportation, I do not think that it does a good job of transporting people between cities that are only a few hundred m...
A.
Energy conservation.
B.
Transportation of the future.
C.
Strip cities.
D.
Advantages of air transportation over railroads.
查看完整题目与答案
【简答题】导游交际语言是导游人员与游客交往时的一种语言形式, 它主要包括哪些形式?
查看完整题目与答案
【单选题】— What are you ______________? — I'm listening to the music. [     ]
A.
do
B.
doing
C.
does
查看完整题目与答案
【多选题】关于道路竖曲线，正确的有（）
A.
竖曲线因坡段转折处是凸形或凹形的不同而分为凸形竖曲线和凹形竖曲线两种
B.
为转折角，其大小等于两相交坡段线的倾斜角之差
C.
值为正，变坡点在曲线上方；ω为负，变坡点在曲线下方
D.
凸形竖曲线设置的目的在于缓和纵坡转折线，保证汽车的行驶视距
查看完整题目与答案
【单选题】选定连续的单元格区域时,先单击区域的第一个单元格,再按住()键单击区域中的最后一个单元格
A.
Ctrl
B.
Shift
C.
Alt
查看完整题目与答案
【单选题】A survey was carried on the death rate of new-born babies in that region,___ were surprising. A. as result B. which results C. over D. the results of which
A.
1
B.
2
C.
3
D.
4
查看完整题目与答案
【单选题】A survey was crried out on the death rate of new-born babies in that region, were surprising. A. as result B. which results C. over D. the results of which
A.
1
B.
2
C.
3
D.
4
查看完整题目与答案