问题 填空题

通过学习,我们能用学到的化学知识解决很多问题,例如:

(1)燃料的燃烧在人类社会的发展过程中起着相当重要的作用,从环境保护的角度考虑,在煤气、沼气、氢气中,首先的燃料是______.

(2)市场有“铁强化酱油”“含氟牙膏”“高钙牛奶”“加碘食盐”等商品,这里所说的铁、氟、钙、碘应理解为______.

(3)废弃塑料带来的“白色污染”的环境问题.为了避免“白色污染”,我们可以做的是______(答一条即可).

(4)杀菌剂波尔多液是用硫酸铜、熟石灰、加水配置而成的,用化学方程式解释不用铁制容器配置波尔多液的原因:______.

答案

(1)氢气燃烧的生成物只有水,不污染环境,所以从环境保护的角度考虑,在煤气、沼气、氢气中,首先的燃料是氢气;故填:氢气;

(2)这里所说的铁、氟、钙、碘应理解为元素;故填:元素;

(3)塑料难以降解,容易形成白色污染,所以应该减少塑料产品的使用或使用可降解的塑料,为了避免“白色污染”,我们可以做的是用布袋代替塑料袋或使用可降解的塑料袋;故填:用布袋代替塑料袋;

(4)铁和硫酸铜反应生成铜和硫酸亚铁,化学方程式为:Fe+CuSO4═FeSO4+Cu,所以不用铁制容器配置波尔多液.故填:Fe+CuSO4═FeSO4+Cu.

填空题
阅读理解

China's top labor official said the country is planning to push back the age at which workers can retire.

Yin Weimin, minister of human resources and social security, demonstrated that we did not put a timetable on the move when he spoke about it during a forum at the weekend.

"Delaying the retirement age is a very complicated issue and we will study it according to the situations of population and employment and consider different groups of people," Yin said.

He noted that hikes in the retirement age have been brought in by many countries and can be a good way to deal with an aging population and ensure the healthy and stable development of social security.

The life expectancy of Chinese people is now 73 years and is expected to rise to 74 during the next five years, he said.

Nearly three out of 10 Chinese people will be older than 60 by 2040, according to a United Nations forecast.

The retirement age in China currently is 60 for men and 55 for female civil servants and 50 for female workers.

The idea of delaying the retirement age is being widely supported by government officials, while many laborers and non-government employees were less enthusiastic about the prospect of working for longer. Currently, they have to pay into their pension plans for at least 15 years before they can retire.

Chen Xianlian, a female worker at a motorcycle parts manufacturer in Chongqing municipality is among those who would like to see the retirement age left as it is. “I have to do lots of tough and repetitive work every day and I feel very tired after my working day,” the 41-year-old said. “All my colleagues are discussing the government's possible move to lift the retirement age. None of us wants to work any extra years.”

University graduates also fear that any rise in the retirement age could limit their employment opportunities.

小题1:We can learn from the passage that ________.

A.China is not planning to push back the age at which workers can retire

B.China is discussing the problem of delaying the retirement age now

C.China is probably going to delay the retirement age

D.China has pushed back the age at which workers can retire小题2:The underlined word “hikes” in Paragraph 4 means ________.

A.increasing

B. marching

C. pushing

D. discussing小题3:According to the current policy, Chen Xianlian has to work ________ more years from now before her retirement

A.14

B. 9

C. 19

D. 15小题4:Which of the following is true according to the passage?

A.All the Chinese people support the new policy.

B.The life expectancy of Chinese people is expected to rise to 73 during the next five years.

C.The retirement age in China will be 60 for men and 55 for female civil servants and 50 for female workers.

D.The government did not set a fixed timetable on the new policy.小题5:It can be inferred from the text that ________.

A.Chen Xianlian is a civil servant.

B.Delaying the retirement age is a very complicated issue.

C.Many countries have begun to delay the retirement age.

D.It may be harder for the university graduate to find a job in the future.