问题 单项选择题 A1/A2型题

关于臂丛分支正确的是()。

A.肌皮神经由后束发出

B.正中神经由内外侧束发出

C.尺神经由内侧束和后束部分纤维汇合成

D.腋神经由外侧干发出

E.桡神经由后干发出

答案

参考答案:B

解析:正中神经以两根分别起于内、外侧束,两根夹持腋动脉。向下成锐角汇合成正中神经,沿肱二头肌内侧缘伴肱动脉下行至肘窝,穿旋前圆肌于前臂指浅、深屈肌之间下行,经腕管至手掌。先发出正中神经返支进入鱼际,继而发出3条指掌侧总神经,再各分为2支掌侧固有神经至1~4指相对缘。故选B。

阅读理解

阅读理解。

     When you think of success, you think of relative achievements in your own world. Each element of your

world is important to you, and there is no need to compare with others. You cannot affect the success of

others; you can affect your own success.

     Success is very much achievable to everybody. Believe that and you have taken the first step. If you do

not believe in yourself, then building self-esteem is your first task. However, believing in your ability to achieve

whatever you want to succeed in, is very important if you are not to be held back by self-doubt throughout

your journey to success.

     There are many things that will affect your ability to succeed, and it is best to focus on those under your

immediate control. Once you do that, then the characteristics you develop can be applied to becoming

successful in a range of activities.

     What is important to you is that, as you start to reach milestones in your ambitions, you should appreciate

your own achievements. Appreciating yourself will strengthen your self-confidence and your determination

to succeed.

     Some of the key characteristics you will find in those who are successful are perseverance, prepared to

research, plan, work hard and practice a lot even when things do not seem to be going well, and an ability to

recover and learn from setbacks. At the beginning of whatever you are trying to succeed in, a strong vision

of your future, planning, and setting yourself achievable tar gets can all play an important role.

     All these qualities, skills and characteristics can be learned and developed. But it is up to you to get things

started. Those who do not start travel nowhere. For others, life can be a continuous journey of fulfillment.

1. According to the passage, if you want to achieve success, what should you do first?

A. Don't compare with others.

B. Bring everything under control.

C. Find out what you have in mind.

D. Feel confident about your ability.

2. Why should you appreciate your own achievements according to the passage?

A. It will allow you to recover from past failures.

B. It will remind you of the vision of your future.

C. It will motivate you to continue pursuing success.

D. It will help you develop your characteristics in everything.

3. The underlined word "setbacks" (in paragraph 5) probably means _____.

A. failures

B. troubles

C. hesitation

D. depression

4. What can we learn from the last paragraph?

A. If you are stuck where you are, you cannot travel far.

B. If you don't start trying, you'll never embrace success.

C. If you are brave enough, you can get whatever you want.

D. If you don't study, you can never reach the destination.

问答题 简答题