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弱电解质的电离平、盐类的水解平和难溶物的沉淀溶解平均属于化学平． I、已知H 2 A在水中存在以下平：H 2 A?H + +HA - ，HA - ?H + +A 2- ． （1）Na 2 A溶液显碱性的原因______（用离子方程式回答）． （2）某温度下，若向0.1mol/L的NaHA溶液中逐滴滴加0.1mol/LKOH溶液至溶液呈中性．此时该混合溶液中下列关系中，一定正确的是______． A．c（H + ）?c（OH - ）=1×10 -14 B．c（Na + ）+c（K + ）=c（HA - ）+2c（A 2- ） C．c（Na + ）＞c（K + ）D．c（Na + ）+c（K + ）=0.05mol/L （3）已知常温下H 2 A的钙盐（CaA）饱和溶液中存在以下平： CaA（s）?Ca 2+ （aq）+A 2- （aq）△H＞0． ①降低温度时，K sp ______（填“增大”、“减小”或“不变”，下同）． ②滴加少量浓盐酸，c（Ca 2+ ）______． II、（4）已知常温下Mg（OH） 2 在pH=12的NaOH溶液中Mg 2+ 的浓度为1.8×10 -7 mol/L，则Ksp[Mg（OH） 2 ]=______．
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The scientists studied fossils. Fossils are very old remains of things that lived long ago.
B.
They studied groups of blind trilobites. Trilobites are a kind of bug-like animal.
C.
They looked similar to modern horseshoe crabs. They all died a long time ago.
D.
They are all facing in the same direction. It also looked like they are staying in contact by using their long spines.
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【多选题】关于伦理与道德的关系，描述准确的是（）
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相关题目：
【单选题】A main idea of the article is that there are fossils that show that blind trilobites used to form lines. Which key detail from the article supports the article's main idea?
A.
The scientists studied fossils. Fossils are very old remains of things that lived long ago.
B.
They studied groups of blind trilobites. Trilobites are a kind of bug-like animal.
C.
They looked similar to modern horseshoe crabs. They all died a long time ago.
D.
They are all facing in the same direction. It also looked like they are staying in contact by using their long spines.
查看完整题目与答案
【单选题】The main idea of the article is that kids have helped to discover some prehistoric things. Which key detail from the article supports that MAIN idea?
A.
Jackson Hepner remembers finding the mammoth tooth.
B.
It was in July 2019 while he was visiting his uncle in Ohio.
C.
He was searching for marine fossils in 2015.
D.
Mehling had never seen one like it in 30 years of fossil hunting in New Jersey.
查看完整题目与答案
【单选题】A main idea of the article is that Bill Clayten helped a young boy and his family. Which key detail from the article supports this MAIN idea?
A.
Bill Clayten received a text message from someone he did not know.
B.
He raised more than $1,500 from friends and companies in a few days.
C.
He started turning blue and wasn't breathing, his mom said. She quickly called 911.
D.
He is getting better, though he will have to stay in the hospital for now, she said.
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【单选题】情理法问题是社会工作者经常碰到的伦理难题之一。这里的“理”是指（ ）。
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【单选题】The MAIN idea of the article is that kids are speaking to Congress about climate change. Which key detail from the article supports the article's MAIN idea?
A.
Congress is part of the legislative branch of government.
B.
There are two bodies within Congress that make laws.
C.
The group will take proposals to Congress.
D.
"Congress has failed to act," he says. It is putting people at risk.
查看完整题目与答案
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A.
道德侧重于反映人们求善的个人实践
B.
道德常用以表述具体的道德行为、道德规范和道德表现
C.
道德更多地用于理论研究、学术探讨等场合
D.
伦理常用以表述道德思想、理论和原则
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【简答题】张大千拜访毕加索时，毕加索曾向其展示了自己对哪位国画大师临摹的作品?
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【判断题】伦理是人伦道德的常理。()
A.
正确
B.
错误
查看完整题目与答案
【多选题】关于伦理与道德的关系，描述准确的是（）
A.
伦理构成了道德的基础和前提；道德则成为伦理的载体和形式
B.
两者的区别：作为日常用法，“伦理”更具客观、外在、社会性意味；“道德”更多地或有可能用于个人，更含主观、内在、个体性意味
C.
伦理是外在的、客观存在的；道德则要将伦理客观化的道理内化主观性的规范
D.
伦理是应然性的社会关，道德是应当如何作为的规范
查看完整题目与答案
【判断题】Don't concentrate on detail until you have understood the main idea.
A.
正确
B.
错误
查看完整题目与答案