短文改错  (共10小题，每小题1分，满分10分）

Dear sir,

Last year I buy a refrigerator in your store on Chang An road. We all like shape of the refrigerator. And recently I find something is wrong with it. It begins to make noise when it turned on. At first it is low but gradually it become louder and louder. To make the matter worse, it even stops working sometimes. We all feel disappointing. I am writing you to ask for help. Would you please send a men to repair it? I will at home this weekend. Please call me before you come to here. My telephone number is 6606.5531. Thanks you very much.

Customer

Li Ming

如图为血液由右心室离开，经消化器官，再回到右心房的循环途径示意图．箭头指血管内血流方向．图中哪二段血管中的血液含氧量最高？（　　）

A．甲和 乙

B．乙和丙

C．丙和丁

D．甲和丁