下表所列各组物质中,物质之间通过一步反应就能实现如下图所示转化的是 ( ) 编号

题型:选择题

问题:

下表所列各组物质中,物质之间通过一步反应就能实现如下图所示转化的是      (  )

编号物质转化关系
CuCuOCuCl2Cu(NO3)2
Na2CO3NaOHNaHCO3CO2
(NH4)2SO3CaSO3SO2NH4HSO3
Al(OH)3Al2O3Na[Al(OH)4]

或NaAlO2

AlCl3
 

A.①②③④     B.①②③      C.①③④     D.②④

考点:元素的性质生活中的元素(常量元素、微量元素)
题型:选择题

Jean is a bright young woman who comes from a rich and famous family. She goes to a good university and has everything that money can buy, well, almost everything. The problem is that the people in Jean’s family are so busy that they can hardly find time to be with her. In fact, Jean is quite lonely.

So Jean spends a lot of time on her QQ. She likes being anonymous(匿名), talking to people who do not know about her famous family and her rich life. She uses the name Linda on QQ and has made a lot of friends who she keeps in touch with quite often.

Last year Jean made a very special friend on QQ. His name was David and lived in San Francisco. David was full of stories and jokes. He and Jean had a common(共同的)interest in rock music and modern dance. So it always took them hours to talk happily on QQ and sometimes they even forgot their time. Of course, they wanted to know more about each other. David sent a picture of himself. He was a tall, good-looking young man with a big happy smile. As time went by, they became good friends and often sent cards and small things to each other.

When Jean’s father told her that he was going on a business trip to San Francisco, she asked him to let her go with him so that she could give David a surprise for his birthday. She would take him the latest DVD of their own rock singer. But when she knocked on David’s door in San Francisco, she found that her special friend was a twelve-year-old boy named Jim.

小题1:Jean spends a lot of time on QQ because she is ____________.

A.rich

B.famous

C.young

D.lonely小题2:Jean thought “David” was special because he __________.

A.made her quite happy on QQ

B.was from San Francisco

C.sent her a picture of himself

D.was tall and good-looking小题3:When Jean and “David” met and introduces themselves to each other, who felt surprised?

A.“David”

B.Both “David” and Jean

C.Jean

D.Neither “David ”nor Jean小题4:What’s the main idea of the passage?

A.Don’t believe those you get to know on QQ so easily.

B.People don’t use their real names on QQ so often.

C.Don’t go to meet those you get to know on QQ.

D.People should tell their real names to others on QQ.

题型:选择题

确诊代偿期肝硬化的检查方法是()

A.腹腔积液

B.脾大

C.肝掌及蜘蛛痣

D.白蛋白与球蛋白比值倒置

E.肝穿刺活检见有假小叶形成

题型:选择题

图是植物根尖结构图,植物吸收水和无机盐的主要部位是(  )

A.①

B.②

C.③

D.④

题型:选择题

在中国古代文献里,台湾地区被称为( )。

A.蓬莱

B.瀛洲

C.夷洲

D.岛夷

E.琉球

题型:选择题

在熔化焊的类型中,()的缺点是生产效率较低,焊接后工件变形和热影响区较大,较难实现自动化。

A.气电焊

B.气焊

C.电弧焊

D.等离子弧焊

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