下列哪项反射活动中存在着正反馈A．腱反射 B．排尿反射 C．减_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

下列哪项反射活动中存在着正反馈

A．腱反射

B．排尿反射

C．减压反射

D．肺牵张反射

E．对侧伸肌反射

答案

参考答案：B

填空题

阅读短文，用所给单词或词组的适当形式填空

while, perfect, too, much, spend, advantage, else, dirty, take an interest in

     Many people like to keep an animal as a pet, such as dogs , cats , birds, and so on. They    1 them.
     A good relationship between people and pets can be very 2   . They listen to you    3    you have something that
can't tell anyone    4 . Some pets can help to    5    your minds when you are unhappy. These are    6    of keeping pets.
     However, pets are often expensive. Feeding them always    7    a lot. People have to 8    much time and money on
them if they keep pets. Sometimes some kinds of pets make your room    9   ,and their shouts give you    10    noise.
Those are disadvantages of keeping pets.

名词解释

殡仪馆的经营决策