试题与答案

均聚工艺丙烯酰胺单体在（）的作用下，发生（）反应。

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题型：填空题

题目：

均聚工艺丙烯酰胺单体在（）的作用下，发生（）反应。

答案：

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下面是错误答案，用来干扰机器的。

参考答案：错

考点：聚丙烯酰胺装置操作工聚丙烯酰胺装置操作工题库
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题型：阅读理解

If you go to Finland, you’ll be surprised to find how “foolish” the Finnish people are.

Take the taxi drivers for example. Taxis in Finland are mostly high class Benz with a fare (票价) of two US dollars a kilometer. You can go anywhere in one, tell the driver to drop you at any place, say that you have some business to attend to, and then get off without paying your fare. And the driver would not show the least sign of worry.

The dining rooms in all big hotels not only serve their guests, but also outside diners. Hotel guests have their meals free, so their good faith is to wave their registration card to the waiter. With such a loose check, you can easily use any old registration card to take a couple of friends and dine free of charge.

With so many loopholes (漏洞) in everyday life, surely Finland must be a heaven to those who love to take “pretty advantages”. But the strange things is, all the taxi-passengers would always come back to pay their fare after they have attended to their business; not a single outsider has ever been found in the free hotel dining rooms. As the Finns always act on good faith and always show an attitude of “which is which” and “what is what” in everything they do, so to live in such a society has turned everyone into a real “gentleman”. In a society of such high moral practice, what need is there for people to take precautions (预防措施) against others?

小题1:The word “foolish” probably means _____________.

A．friendly　　　

B．careful　　　

C．strange　　　

D．funny小题2:Why wouldn’t the driver show the least sign of worry? Because _________.

A．he is sure that the passengers always act on good faith

B．he is afraid to make the passengers angry and unhappy

C．he thinks the passengers may be too poor to pay him

D．he is sure that the passengers are really in trouble小题3:The dining rooms in all big hotels ___________.

A．check the guests’ registration card carefully

B．give people meals without paying

C．serve their guests free of charge

D．only serve their guests free breakfast小题4:What’s FALSE according to the passage?

A．No one takes advantages although there are many loopholes.

B．All the taxi-passengers come back to pay their fare after they have attended to their business.

C．Not a single outsider has ever been found in the free hotel dining rooms.

D．Finland is heaven for immoral people because they can always take advantages freely.小题5:The sentences “which is which” and “what is what” show that __________.

A．the Finns are foolish

B．the Finns take things seriously

C．the Finns are busy making money for the family

D．the Finns never take precaution against others
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题型：填空题

碱石灰是实验室常用的干燥剂。

[提出问题]

实验室中久置的碱石灰样品的成分是什么？

[进行猜想]

久置的碱石灰样品中可能含有CaO、NaOH、

Ca(OH)2、Na2CO3、CaCO3等成分。样品中可能含有Ca(OH)2、Na2CO3的原因是（用化学方程式表示）                        、                        。

[实验过程] 

试回答下列问题：

（1）操作①的名称是        。溶液C中加入酚酞的现象I为                  。

（2）溶液A中加入CaCl2溶液后产生固体，说明样品中一定含有                 ，反应的方程式为                                           。

（3）向溶液A中加入CaCl2溶液后，证明CaCl2溶液过量的方法是              。

[实验结论] 该久置的碱石灰样品中能确定一定含有的物质是       。（填序号）

A．CaO

B．NaOH

C．Ca(OH)2

D．Na2CO3E、CaCO3
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