下列物体中有生命的是（ ） A．太阳 B．珊瑚 C．病毒 D．恐龙骨骼

橡胶制医疗用导管

阅读理解。

     People in different countries have different ways of doing things. Something that is Polite in one

country may be quite impolite in another. In Britain, you musn't lifte your bowl to your mouth when you

are having some liquid food. But it's different in China. and in Japan you even needn't worry about

making noises when you have it. It shows that you are enjoying it. But it is regarded as bad manners in

Britain. If you are visitor in Mongolia, what manners do they wish you to have? They wish you to give a

loud "burp" (打嗝) after you finish eating, Burning shows that you like the food.

     In Britain, you should try not to put your hands on the table when you're having a Meal. In Mexica,

however, guests are expected to keep their hands on the table during a meal. But in Arab countries you

must be very careful with your hands. You mustn't eat with your left hand. Arab consider it very bad

manners eating with left hands. So, what should you do if you are on a visit in another country? Well, just

do in Rome as the Romana do. You can ask the native people to help you or just watch carefully and

follow them.

1. According to the passage, making noises when you have liquid food isn't bad manners in _______ .

A. China  

B. Jappan  

C. Britain  

D. Mongolia

2.  _______ is bad manners in Britain.

A. Eating food without making noises

B. Putting liquid food in the bowl

C. Having soup directly with a bowl

D. Keeping hands off the table

3. From the passage, we can infer that ________ .

A. Mongolian people burp when they are eating

B. Japanese people all make noises when drinking

C. Chinese people never make noises at table

D. few Arabs eat with left hands

4. " Do in Rome as the Romans do" means ________.

A. Do as the native people do

B. Do as you do at home

C. Ask the native people to do it

D. Watch the native people doing it

5. The passage mainly tell us ________.

A. some table manners in Britain

B. some different tables manners

C. different ways of having liquid food

D. to have good manners

胎盘早期剥离的主要病理变化是()。

A．包蜕膜出血

B．胎盘血管痉挛

C．底蜕膜出血

D．真蜕膜出血

E．胎盘边缘血窦出血

下列属于晚成鸟的是（　　）

A．鸡

B．鸭子

C．大雁

D．鸽子

例举部分专项柔韧素质的练习方法？