急性左心功能不全,注射吗啡的机制错误的是() A.扩张外周血管 B.收缩外周血管 C

题型:单项选择题

问题:

急性左心功能不全,注射吗啡的机制错误的是()

A.扩张外周血管

B.收缩外周血管

C.镇静

D.改善呼吸困难

E.减轻烦躁

考点:北京住院医师急诊科Ⅰ阶段心脏内科及CCU心脏内科及CCU题库
题型:单项选择题

乙烯制冷压缩机从正常转速降到调速器最低动作转速时,下列处理方法不正确的是()。

A、降抽汽

B、调节返回阀

C、调整喷淋

D、手动控制降速

题型:单项选择题

下列有关实验操作中,正确的是

A.用试管取出试剂瓶中的NaOH溶液,发现取量过多,为了不浪费,又把过量的试剂倒入试剂瓶中

B.银镜反应实验后的废液可先倒入水槽中,再用水冲入下水道

C.向试管中滴加液体时,胶头滴管必须紧贴试管内壁,避免液体溅出

D.用浓硫酸配制一定物质的量浓度的稀硫酸时,浓硫酸溶于水后,应冷却至室温才能转移到容量瓶中

题型:单项选择题

阅读理解。

     It was a long process that involved creating a resume, submitting an online application (申请) and

attending a round of interviews. Naturally Tan Kaiyin, a 21-year-old student is excited when she was

selected, as more than 660, 000 people signed up to volunteer at the 16th Asian Games in Guangzhou,

but only less than 10 percent were finally chosen to work in the venues and wear the white and green

sport uniforms.

     Like in any major sporting event, volunteers play a vital role in assisting with operations and Tan's

function here is not any different. She is based at the Garden Hotel and is tasked with helping guests and

officials who have issues with their accreditation cards (注册卡). "I deal with guests from all over the

world, I have never met so many international people and it is very, very exciting to have this opportunity

to interact with them. They come to the office because they need to make a change in their accreditation

card and usually they are in a hurry, so we try our best to get it done quickly."

     She admits the first few days involved extremely long hours, however she likes the challenge as it

gives her an immense sense of satisfaction especially when an irate guest turns a frown into a smile and

says "thank you".

     Tan deals with people from different cultures and personalities and feels she has learned so much in

the past week, an experience that she would have never gotten if not for the Guangzhou Asian Games,

therefore she is very happy and grateful for being a part of this. She also has kind words for her

managers and fellow colleagues and says the hard work and positive atmosphere has bonded them into

a family. She enjoys her responsibilities so much that she is afraid of feeling lost when the Games finally

end on Nov. 27.

     However, she is aware of all the positive effects the Games have had on Guangzhou. From

improvements to air and water quality to better transportation and infrastructure in the city, but most

importantly to her is the fact that the Asian Games has placed Guangzhou prominently onto the world

map. This, she believes, will encourage people from all over the world to continue visiting her city, and

this in turn will give the residents of Guangzhou a fantastic opportunity to continue learning about different

cultures. The official Asian Games Volunteer Slogan is, "Together, we can make it better!" Indeed it

seems they can.

1. What can we learn from the text?

A. At most 660, 000 people signed up to volunteer at the 16th Asian Games.

B. It is not difficult to be selected as a volunteer at the 16th Asian Games.

C. Tan felt excited to have the opportunity to interact with people from all over the world.

D. It is very easy for Tan to do the voluntary work.

2.What makes Tan feel happy and grateful for being part of Guangzhou Asian Games?

A. She experienced a lot and learned so much in her work

B. She earned a large amount of money

C. She learned different cultures

D. She dealt with people from different personalities.

3. In Tan's opinion, what is NOT the positive effects the Games have had on Guangzhou?

A. Improvements of air and water quality and better transportation

B. Asian Games has place Guangzhou prominently onto the world map.

C. The Game will give the residents of Guangzhou a fantastic opportunity to continue learning

     about different cultures.

D. It disturbs people's normal life who are living in Guangzhou.

4. Which word is not suitable to describe Tan?

A. brave

B. optimistic

C. responsible

D. depressed

题型:单项选择题

关于成人牙釉质描述哪项是正确的()。

A.有基于细胞活动上的防御机制

B.能通过细胞修复达到自愈

C.能进行诸如糖酵解等的生命活动

D.能进行重要的物理-化学交换反应

E.能对微生物的入侵产生炎症反应

题型:单项选择题

下列图标表示()

A.发动机

B.水泥三联杆

C.发电厂

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