下列关于动作电位的描述中,哪一项是正确的?()A.刺激强度低于阈值时,出现低幅度的动

题型:单项选择题

问题:

下列关于动作电位的描述中,哪一项是正确的?()

A.刺激强度低于阈值时,出现低幅度的动作电位

B.刺激强度达到阈值后,再增加刺激强度能使动作电位幅度增大

C.动作电位的扩布方式是电紧张性的

D.动作电位随传导距离增加而变小

E.在不同的可兴奋细胞,动作电位的幅度和持续时间是不同的

考点:临床执业医师基础综合第二章生理学基础综合第二章生理学题库
题型:单项选择题

9和12的最大公因数是______;4、5和12的最小公倍数是______.

题型:单项选择题

结算会员由()组成。

A.交易结算会员

B.全面结算会员

C.特别结算会员

D.期货公司会员

题型:单项选择题

The campers______their tent in a sheltered valley.

A.established

B.installed

C.pitched

D.fixed

题型:单项选择题

阅读理解。

     I'm a 20-year-old boy, and the following is my story.

     A month after I graduated from high school in August, 2007, I was coming home from swim practice

in the training centre of the city and was involved in a car accident. I was so seriously injured that I was in

a coma for more than two months at Prince Georges Hospital.

     I suffered a lot from the experience of dying eight times during my coma and I couldn't open my mouth

to talk or to communicate when I eventually came around. At that time, it seemed that walking was never

going to happen again due to all the extreme injuries. Just like my body, my dreams were completely destroyed.

But I was not going to let my injuries stop me from realizing my dreams.

     After receiving a total of 15 operations and 36 blood transfusions, I had to make every great effort to learn

to talk, eat, walk, shower, and live on my own again. When I was out of hospital, I still had to go to outpatient

therapy in Waldorf, Maryland. After I spent a few months in a wheelchair, I took baby steps to walk on my

own. It was a miracle that I was able to walk again, but I still wanted to prove that I could not only walk, but

also run. When it came true, I wanted to get back into the pool again. After having a few lung tests, I was able

to go in the pool a little bit each week. After a few months of swim training, I began my freshman year at St.

Mary's College of Maryland and then became a proud member of the swim team.

     By telling my story, I want to make a positive influence on the world. I am just trying to live each day to

the fullest and inspire other people never to give up their dreams no matter how bad a situation is to them. I

remember when I was still in my hospital bed, I would have my mom and dad push me round in my wheelchair

to the other rooms to see the other patients and chat with them and their family members. I wanted to let them

know that everything was going to be okay. Somehow, things would work out for the best.

1. The underlined word "coma" in Paragraph 2 probably has the meaning of "_____". [ ]

A. operation

B. unconsciousness

C. treatment

D. emergency

2. According to Paragraph 3, it can be inferred that the author _____. [ ]

A. was unable to talk or communicate

B. was in despair

C. faced physical and mental challenges

D. felt anxious about his state

3. What is the correct order of the following events?

    a. went to outpatient therapy

    b. received membership of the swim team

    c. was pushed around to visit other patients

    d. walked like a baby e. learnt to live all by himself [ ]

A. d、a、c、b、e

B. e、c、d、a、b

C. d、c、a、b、e

D. e、c、a、d、b

4. In the last paragraph, the author mainly wants to show _____. [ ]

A. his positive influence on other patients

B. his meaningful life

C. his purpose of sharing his story

D. his great achievements

5. The best title for the passage would be "_____". [ ]

A. Attitude is everything

B. Actions speak louder than words

C. Everything happens for a reason

D. A good beginning is half done

题型:单项选择题

女性,27岁,会计。因"不断思考问题,重复无意义动作并引起痛苦2年,自伤1天"主动请朋友陪诊来精神科急诊。患者坐立不安,情绪激越。双手手背可见新鲜烟烫痕迹。

该患者存在哪些强迫行为()

A.强迫检查

B.强制性思维

C.强迫洗涤

D.强迫性仪式动作

E.强迫计数

F.强迫询问

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