药物E具有抗癌抑菌功效,其合成路线如下。 已知:NaBH4是一种很强的还原剂,

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问题:

药物E具有抗癌抑菌功效,其合成路线如下。

已知:NaBH4是一种很强的还原剂,可以将-CN还原为-CH2NH2

(1)关于化合物D的说法错误的是_______________

a.1molD最多可与3molH2发生加成反应    b.可以与盐酸发生反应

c.可以使高锰酸钾酸性溶液褪色           d.是烃的含氧衍生物

(2)反应③在水溶液中进行,HCl是催化剂,此反应中除了生成D外,还有一种产物,该产物的名称是_________________。

(3)E的结构简式为______________________。

(4)合成路线中设计反应①和③的目的是____________________________________________

(5)阅读以下信息,依据以上流程图和所给信息,以CH3CHO和CH3NH2为原料设计合成α-氨基丙酸【CH3CH(NH2)COOH】的路线。

已知:

提示:①合成过程中无机试剂任选,②合成反应流程图表示方法示例如下:

A→B→C…→H.

考点:结构简式结构式
题型:填空题

中国是世界上遭受自然灾害危害最严重的国家之一,因而防灾减灾的任务十分重要也非常艰巨。据此回答题。

小题1:对我国影响最大的自然灾害是(  )

A.干旱和泥石流

B.台风与干旱

C.洪涝与干旱

D.台风与寒潮小题2:针对我国自然灾害频繁发生的国情,开展防灾减灾活动,对我国的生产建设和人民生活意义重大。下列工程中,属于防灾减灾设施建设的是(  )

①兴建长江三峡大型水利枢纽 ②兴建长江、黄河中上游防护林工程 ③修建“西气东输”管道 ④在沿海一带修建海防林工程 ⑤兴建广东大亚湾和阳江核电站 ⑥加固长江、黄河、珠江大堤

A.①②③④

B.②③④⑤

C.①②③⑥

D.①②④⑥

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Once when I was a teenager, my father and I were standing in line to buy tickets for the circus. Finally, there was only one family between the ticket office and us. This family made a big impression on me.

There were eight children, all probably under the age of 12. You could tell they didn’t have a lot of money. Their clothes were not expensive, but they were clean. The children talked excitedly about the clowns. It was clearly a very important day out for them. The father and mother seemed happy as they could be.

The tickets lady asked how many tickets the father wanted, he proudly answered, “Please let me buy eight children’s tickets and two adults’ tickets, so I can take my family to the circus.”

The ticket lady told him the price.

The man’s wife lowered her head. There was no longer a smile on the man’s face. He quietly asked, “How much did you say?”

The ticket lady again told him the price.

The man obviously didn’t have enough money. But how could he tell his kids the bad news?

Seeing what was happening, my dad took a $20 note from his pocket and dropped in on the ground. (We were not rich ourselves at all!) He then tapped the man on the shoulder and said, “Excuse me, sir, you dropped this.”

The man understood my father was helping him. He picked up the money, looked straight into my dad’s eyes, and in tears replied. “Thank you. This really means a lot to me and my family.”

Although we did not go to the circus that night, we didn’t go without.

小题1:Why does the writer say “Their clothes were not expensive, but they were clean” ( Paragraph 2)?

A.To show how rich the family were.

B.To show cheap clothes could be popular.

C.To show how hard the mother worked.

D.To show the children were well looked after.小题2: Why was the poor man unhappy after he spoke with the ticket lady?

A.He had lost his money.

B.His children were noisy.

C.The tickets were sold out.

D.The tickets were too expensive.小题3:Who did the $20 note belong to?

A.The poor man .

B.The writer’s father.

C.The poor man’s wife.

D.The ticket lady.小题4:Why was the poor man in tears at the end of the story?

A.He found the money he lost.

B.He wanted others to help him.

C.He made his children unhappy.

D.He was thankful for the kindness.小题5:Which of the following statements is probably true according to the passage?

A.The poor mans saw the circus that night.

B.The two families became close friends.

C.The writer’s father earned some money.

D.The writer saw the circs that night.

题型:填空题

依据《使用有毒物品作业场所劳动保护条例》的规定,发生职业中毒事故或者有证据证明职业中毒危害状态可能导致事故发生时,卫生行政部门有权采取临时控制措施。下列做法不正确的是()。

A.责令暂停导致职业中毒事故的作业

B.封存造成职业中毒事故或者可能导致事故发生的物品。

C.组织控制职业中毒事故现场。

D.关闭造成职业中毒的企业

题型:填空题

终端短路的无损耗传输线长度为波长的倍数为()时,其入端阻抗的绝对值等于特性阻抗。

A.1/8

B.1/4

C.3/4

D.1/2

题型:填空题

开立哪类银行结算账户需要经中国人民银行核准()。

A.基本存款账户

B.一般存款账户

C.验资账户

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