问题 单项选择题

女性,16岁,查体发现心尖部舒张期隆隆样杂音伴开瓣音,心率72次/min,律齐,肺无异常。肝脾未触及,下肢不肿。超声心动图示二尖瓣瓣口面积1.7cm2,平时活动无受限。应做哪项处理()

A.抗生素预防感染性心内膜炎

B.二尖瓣分离术

C.洋地黄治疗

D.利尿剂治疗

E.避免重体力活动,定期随诊

答案

参考答案:E

阅读理解

阅读理解。

      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.

1. World economy means ______ to Canada. [ ]

A. closing and moving

B. competition

C. low wages

D. improvement

2. Which of the following will be fewer in the future in Canada? [ ]

A. Restaurants

B. Shops

C. Doctors

D. Farmers

3. 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

4. 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.

单项选择题 A1型题