搜题请搜索小程序“爱下问搜题”
问题 选择题

下列说法有误的是（　　）

A．先天性行为是动物生来就有的

B．先天性行为是动物先天具有的本能，由遗传因素决定

C．学习行为与遗传因素无关

D．蚯蚓走迷宫，黑猩猩吃高处的香蕉等都是学习行为

答案

动物行为分为先天性行为和学习行为，先天性行为是指动物一出生就有的一种行为方式，是动物的一种本能，由体内的遗传物质决定的，如蚂蚁搬家、鸟类筑巢、蜘蛛织网、蜜蜂采蜜等就是动物的一种本能，属于先天性行为．而学习行为是动物出生后在成长的过程中通过环境因素的影响，在遗传因素的基础上，由生活经验和“学习”逐渐建立起来的，是在先天性行为的基础上建立的一种新的行为活动，也称为后天性行为，如鹦鹉会说“你好”“再见”、蚯蚓走迷宫、黑猩猩吃高处的香蕉等，动物越高等，其学习的本领越强．

故选：B

完形填空

SECTION  C

Directions: Complete the following passage by using ONE word that best fits the context.

An old blind man helped Polly in a terrible fog, Polly wanted to thank the old man for his help and wrote a letter to the newspaper to thank him for it. Here is her letter to the newspaper.

To the man in the fog,

I’d like to thank you for your kind help in the terrible fog last week. I was so frightened at that time that I could hear my heart  58 very fast, but you made me feel safe with your kindness. I’m very 59  to you for your help.

That day, I tried to take my usual bus home before the fog became too thick, but the bus conductor told me to Green Park by Underground and find a taxi there. I  60  his advice. When I arrived at Green Park and got to the station entrance, it was deserted. The fog lay  61  a thick grey cloud. Weather that bad is really rare these days. It was impossible to find a taxi. I had to  62  in the fog. I became frightened as I could hear the footsteps but couldn’t see anyone. You spoke to me and offered help. I was frozen  63  fear for a moment, but then I decided you had a kind voice, so I answered you.

It was the best decision I ever made. You took my hand and led me confidently through the streets 64 my house. Your hand was rough but strong and warm. Imagine my surprise when you told me you were blind! I wanted to invite you to my home to rest for a while, but you left so quickly to help other people who were lost in the fog. I regret that I didn’t have the chance to  65  my thanks to you. If anyone knows this kind man, please contact me through the newspaper so I can thank him personally.
查看答案
单项选择题

脊髓骶节内（）

A.有薄束和楔束

B.有楔束无薄束

C.没有脊髓丘脑束

D.有交感神经的低位中枢

E.有副交感神经的低位中枢
查看答案