问题 单项选择题

螺旋器位于()。

A.蜗管

B.椭圆囊

C.咽鼓管

D.膜半规管

E.球囊

答案

参考答案:A

解析:螺旋器又称Corti器,是人类的听觉感受器。位于内耳膜迷路的蜗管的下壁(下壁即蜗鼓壁又称基底膜或螺旋板),由Hensen细胞、外指细胞、外毛细胞、外柱细胞、内柱细胞、内毛细胞、内指细胞齿间细胞以及盖膜组成,内有外隧道、内隧道、Nuel腔,并且有神经纤维发出连接螺旋神经节,能够将内淋巴的振动转化为神经冲动。

填空题

根据下列短文内容,在短文后的空格处填上一个恰当的词,使短文完整、通顺。

     What can you do to keep healthy? Perhaps for children, healthy eating is one of the most important things.

Here are some ideas about   1   to eat healthily. Having breakfast

     A good breakfast is very important to children. It's necessary to have it in the   2  . But some children often

go to school   3   breakfast, just because they want to sleep a little longer. Remember that a good breakfast will

help you study better. Having milk 

     "My dream is that all the Chinese children can get half a kilogram (公斤) of milk a day." The Chinese

Premier ( * * ) Wen Jiabao said this during his visit to a milk farm. Milk is also very important to children's

health. It makes children   4   stronger. It's better for you to   5   a glass of warm milk before going to bed.

That will help you have a good   6 

     Having healthy food is the most important. That means eating lots of different   7   of

food, especially fruits and vegetables. Don't eat too much chocolate   8   ice-cream. Some of you   9   eating

fast food, but in fact it is not good for your health. Try to eat healthy food as much as   10 

     Have healthy eating habits, and you will have a strong body.

1. __________   2. __________   3. __________   4. __________   5. __________

6. __________   7. __________   8. __________   9. __________   10. __________