问题 填空题

请用化学知识回答:

(1)化石燃料通常是指煤、______、天然气;用石灰浆粉刷墙壁后的室内放置一燃烧的煤炉,可使墙壁迅速硬化,同时墙壁上会出现一些水珠,其原因是(用化学方程式表示)______.

(2)如果煤炭长期密实地堆积,可能会因______导致温度升高而自燃;当大量堆积的煤发生燃烧时,灭火的最好方法是______(写一种).

(3)汽车的尾气管中装有金属铂、钯的合金网,目的是将汽油燃烧时产生的有害气体CO、NO转变为CO2和N2,那么这些金属在反应中起的作用是______.

答案

(1)天然气、煤、石油属于化石燃料.故填:石油.

氢氧化钙和二氧化碳反应生成碳酸钙和水,化学方程式为:Ca(OH)2+CO2=CaCO3↓+H2O

(2)煤容易发生缓慢氧化,缓慢氧化放出热量,如果空气流动不畅时,容易发生自燃.煤发生燃烧时,灭火的最好方法是隔绝氧气.故填:缓慢氧化;用沙或石棉等方法隔绝空气(注:若用水或用泡沫灭火器浇灭,会产生水煤气:H2与CO的混合气体).

(3)有害气体CO、NO转变为CO2和N2,通过这个转化可以看出,生成物中没有金属元素的出现,所以这些金属在反应中作催化剂.故填:催化作用.

阅读理解

A company advertised in the newspaper for a sales position. Details of the requirements, salary and benefits were given. It was also clearly stated that applicants needed to take an aptitude test (能力倾向测试) and an interview. However, looking at the whole advertisement, one could not find any contact information of the company.

Most interested applicants thought that it was the company’s HR department’s carelessness or a printing error. They therefore waited patiently for the newspaper to publish an amendment(订正). But instead of waiting for the newspaper to publish the company details, another three applicants took the initiative(主动性) to find out the company’s contact information themselves.

Tim did a search on the Internet. By typing the company’s name, he easily obtained all the information including its contact number. Lisa called up the local telephone number search service and found out the company’s office number. She called up the office and got the required contact information. Donna put in a greater effort in her search. She remembered seeing a poster by the same company in the city so she drove all the way down and made a few rounds to search for it. She finally found it together with the company’s contact information.

Three days after that advertisement was published in the newspaper, most interested applicants were still waiting eagerly for an amendment. On the other hand, the application letters and resumes of Tim, Lisa and Donna had already reached the hands of the company’s HR manager. They were then called up for an interview. During the interview, all went well and immediately they were hired. The three of them were a little surprised at how fast things went on. They were expecting for an aptitude test as stated in the advertisement. The HR director answered them, smiling, “Our test is hidden in the advertisement itself. To be a good salesperson in this age, he or she has to be broad-minded and very importantly, does not follow rigid (死板的) steps or rules. You are all clever. In a short time, you’ve managed to find ways of contacting us. It shows clearly that you have passed the test with flying colors!”

The fools sit around waiting for their chances whereas the wise actively take actions with great initiative.

小题1:According to the passage the company wanted to test the applicants’ ______.

A.sales skills

B.carefulness

C.attitude

D.initiative小题2: Whose search skill is the easiest of all?

A.Tim’s.

B.Lisa’s.

C.Donna’s.

D.None.小题3:What can we infer from the passage?

A.The HR manager of the company made a mistake.

B.The company meant to omit (遗漏) its contact information.

C.The HR manager of the company was unfit for his / her job.

D.A printing error occurred in the advertisement in the newspaper.小题4:Which of the statements is NOT correct according to the passage?

A.Many applicants thought the company made a mistake.

B.The advertisement was very special to many applicants.

C.Whoever found the company’s contact information didn’t need to have an interview.

D.The company needed broad-minded and clever salespersons.小题5:The writer wants to tell us through this passage that ______.

A.no contact information seen in an advertisement might not be the company’s mistake

B.applicants should be careful not to be fooled by the company’s advertisement

C.opportunity always belongs to whoever is active and broad-minded

D.there are many successful chances to be found in this age

单项选择题