设x*y定义为x*y=（x+1）（y+1），x*2定义为x*2=x*x，则多项式

短文改错/Proofreading and error correction

It was the chance of a lifetime to win the first prize on the Story Writing Show. All I had to do was to write a story or present it. My teachers have been telling me how great my writing was. So if they had said was true, I would have a chance of winning the prize. What were better, I had useful help. There was Uncle Chen, gentleman living near my house, who was a very much famous writer. He agreed to reading my story and give me some advices on how to write like a real writer.

10（）

根据《海关法》规定，进口货物的报关期限为自运输工具申报进境之日起( )天之内，进口货物的收货人或其代理人逾期申报的，由海关征收滞报金，滞报金的日征收金额为进口货物到岸价的( )。

A．14，0.05%

B．14，0.5%

C．15，0.05%

D．15，0.5%

由于市场价格的变动，使得经济主体蒙受损失的可能性，属于（）。

A.信用风险

B.决策风险

C.市场风险

D.操作风险

根据《广西壮族自治区环境保护条例》的规定，污染物排放实行（）。

A.谁污染谁治理

B.总量控制

C.谁开发谁保护

D.浓度达标

移动通信系统的基本组成包括哪几部分？