问题 单项选择题

( )是有机体在神经系统的参与下,对内外环境刺激做出的规律性回答。

A.反射

B.反射弧

C.反馈

D.反应

答案

参考答案:A

解析: 反射是有机体在神经系统的参与下,对内外环境刺激做出的规律性回答。反射弧是实现反射活动的神经通路,它由感受器、传入神经、反射中枢、传出神经和效应器五个部分组成。反馈是指反射活动的结果又返回传到神经中枢,使神经中枢及时获得效应器活动的信息,从而更高效地调节效应器活动的过程。

阅读理解

阅读理解。

     When I was fifteen months old, I fell on a glass rabbit which cut my eye badly enough to blind it. And

as I grew, this sightless eye, in so many ways controlled me that I walked with my face looking at the floor so people would not see the ugly me.

     Yet Mama would hold me in her arms, feel my hair gently and say, "If you hold your head up high, it

will be OK. And people will see your beautiful soul." She continued this message whenever I wanted to

hide.

     As a little child, I thought Mama meant, "Be careful or you will fall down or bump into something

because you are not looking." As a teenager, I found that my mama's words helped me begin to realize

that by letting people look at my face, I let them recognize the intelligence and beauty behind my eyes.

     In high school I was successful both academically and socially. I was even elected class president, but

inside me I still felt like a freak (畸形人). When things got really bad, I would cry to my mama and she

would look at me with loving eyes and say, "Hold your head up high and face the world. Let them see the beauty that is inside."

     When I met the man who became my partner for life, we looked each other straight in the eye, and he

told me I was beautiful inside and out. Mama's love and encouragement were the spark that gave me the

confidence to overcome my own doubt.

     "Hold your head up high" has been heard many times in my home. Now, I'm a mother, too. Each of my children has felt its invitation. The gift my mama gave me lives on in another generation.

1. What is TRUE of the writer's eyes? 

A. She was blind in one eye when she was born.

B. Her blindness was caused by a traffic accident.

C. She became blind in one eye because of a fall.

D. She lives unhappily because of her blindness.

2. When the writer was a high school student, she ______. 

A. was proud of her beauty that was inside

B. was active in taking part in social activities

C. was filled with doubts and worries about her sightless eye

D. was good at her study but sometimes lacked confidence

3. What does the underlined word "invitation" mean?

A. encouragement

B. advantage

C. warmth

D. weight

4. What's the author's purpose in writing the passage?

A. To show the power of confidence.

B. To express her gratitude (感激之情) to her mom.

C. To explain how to build confidence.

D. To inspire people to face difficulties

单项选择题