Directions: Write an essay of 160-200 words based on the following drawing. In your essay, you should

1) describe the photos briefly,

2) explain its intended meaning, and

3) support your view with an example/examples.

You should write neatly on ANSWER SHEET 2.

（）是指社会经济关系在流通领域所采取的具体形式，或者说是社会经济制度在流通经济关系方面的具体化。

A.流通体制 

B.流通机制 

C.流通要素 

D.流通环节