下列要素哪项是组织实现目标、满足社会需要的根本保证（）A、组织目标 B、任务 C、职

草酸(H₂C₂O₄)是二元弱酸，KHC₂O₄溶液呈酸性。向100mL0.2mol/L的草酸溶液中加入1.68 g KOH固体，若溶液体积不变，则对所得溶液中各粒子浓度之间的关系描述正确的是

A．c(C₂O₄^2－)＋c(HC₂O₄^－)＋c(OH^－)＝c(K^＋)＋c(H^＋)

B．c(C₂O₄^2－)＋c(HC₂O₄^－)＋c(H₂C₂O₄)＝0.2mol/L

C．c(C₂O₄^2－)＜c(HC₂O₄^－)＜c(H₂C₂O₄)

D．c(H^＋)＜c(HC₂O₄^－)＜c(C₂O₄^2－)＜c(K^＋)

某工业企业2003年转让一幢新建办公楼取得收入5000万元，该办公楼建造成本和相关费用3700万元，缴纳与转让办公楼相关的税金275万元（其中印花税金5万元）。该企业应缴纳土地增值税（）。

A．96.75万元

B．97.50万元

C．306.75万元

D．307.50万元

John James Audubon was born in 1785 and died in 1851, but his name is still talked about every day. Audubon was a scientist who loved nature. He wanted to show people the importance of nature in their lives. He was especially interested in birds, and painted many beautiful pictures of them.

In1950, the National Audubon Society was formed by people who were also interested in birds and wanted to continue Audubon’s nature studies. Even now, when people think of the Audubon’s Society, they usually think of birds. But the Society does other things besides watching birds.

The members of the Society try to improve the environment as much as they can. They let the public know about the laws that are needed. They have helped to pass many laws that protect birds and animals, and people, too. They teach young people how to protect their environment. They try to make their own communities (社区) cleaner, better places to live in.

John James Audubon knew that nature was important. He did not know how important his work would become.

小题1:“ His name is still talked about every day.” means “_________”.

A．People seldom speak of his name.

B．He is still remembered by people

C．His name is very important

D．Pay attention to his name, please.小题2: The National Audubon Society was founded by _________.

A．Audubon’s supporters

B．Audubon himself

C．the scientists

D．the painters of birds小题3: People often think of birds when the Audubon Society is told about because ____________.

A．some birds had joined the Society

B．the Society did a lot in protecting birds.

C．the Society had no interest in birds

D．all the members of the Society were painters of birds小题4: What do you think is the best title for the article?

A．Audubon and the National Audubon Society

B．How to Protect Birds

C．How to Keep Our Environment Clean

D．The Greatest Society

《中国汉字听写大会》的宣传语是“书写文明传递，民族的未雨绸缪”。“键盘冲击”催生网络时代的汉字保卫战，是因为（）

①汉字是民族情感的集中表达

②汉字是中华文明的重要标志

③汉字是中 * * 得以延续、发展的基本载体

④汉字的发明标志着人类进入文明时代

A、①②

B、②③

C、②④

D、①④