问题 解答题

冬天,外界寒冷、干燥并混有灰尘和细菌的空气,通过鼻腔后变成温暖、湿润、清洁的空气.______.

答案

鼻腔是呼吸道的器官之一,与呼吸功能相适应,其内部有鼻毛,可阻挡灰尘;内表面的鼻黏膜上的腺细胞能够分泌黏液,粘住和阻挡灰尘和湿润空气,黏膜中还分布有丰富的毛细血管,起到温暖空气的作用.这些都能够减少了对肺的刺激.鼻腔具有清洁、湿润和温暖空气作用.

故答案为:√

问答题
阅读理解

C

Today, we have a world economy. Canadian businesses and workers must compete with businesses and workers in other countries.

Every year, more Canadian factories are closing or moving。 They cannot compete with factories in countries where wages(工资) are low. In the future, there will be fewer jobs for factory workers in Canada.

Many Canadian businesses are trying to spend less money. For example, they are hiring more part-time workers and more temporary(临时的) workers. They are employing fewer permanent(永久的)full-time workers. More services, fewer goods. Canada’s economy is changing. Businesses are making fewer goods(for example: shoes and radios). But Canadian businesses are providing more services to people.

In the future, there will be more jobs for people who provide services. For example: sales people, waiters and waitresses, home health care workers, bakers and cooks.

There will be fewer jobs for other kinds of workers(for example: farmers , miners , fishermen, forestry workers and factory workers).Many new jobs will be in small businesses with 20 or 30 employees. Technology machines are changing the way people work. Business are using many machines (for example: computers and robots).

Businesses will need fewer workers. And some jobs will disappear. Many grown-ups will have to go back to school or train for new jobs. Workers will not stay in the same job for their lifetime. The population of Canada is changing.

Today, many Canadians are in their 30s and 40s. They need goods and services. As they get older, they will need different goods and services.

Canadians come from many cultures. They have different customs and religions. Employers and workers must learn to work with many different people.

44. World economy means_________ to Canada.

A. closing and moving           B. competition

C. low wages                   D. improvement

45. Which of the following will be fewer in the future in Canada?

A. Restaurants       B. Shops        C. Doctors  D. Farmers

46. Businesses will need fewer workers because_____________.

A.  the owners can’t afford them

B. some jobs will disappear

C. machines will take the place of workers in many ways

D. the workers will have to be trained for new jobs

47. Which of the following statements is TRUE?

.A. Many people who come from different cultures will work together.

B. All Canadians have the same culture and religion

C. Different cultures will do good to Canada

D. Many Canadians will change their jobs in the future.