若△ABC的三边a、b、c满足a²＋b²＋c²十338＝10a＋24b＋26c，

In order to improve our English, an English evening is going to held in our school dining hall. It will start from 7:30 p.m. and end at 10:00 p.m. the next Friday. You will enjoy English stories at the “evening”. Some English songs will also be singing. What’s more, some English poems and short plays will he performed, either. In addition, Mr. and Mrs. Brown from Canada, working in our school, together with his children, will be invited to our “evening”. They will give us wonderfully performances. Everybody is welcome to attending the “evening”. We hope all of you can be there on time and will appreciate the performances. We also hope your English will be greatly improve after this “evening”.

进口药品到岸后进口单位向海关办理报关验放手续应凭（）

A.《进口药品注册证》

B.《医药产品注册证》

C.《进口准许证》

D.《药品经营许可证》

E.《进口药品通关单》

关于尿瘘，哪项不恰当（）

A.产伤是引起尿瘘的主要原因

B.尿瘘患者常合并有尿路感染

C.亚甲蓝试验， * * 内流出清亮液体，为输尿管 * * 瘘

D.行膀胱镜检查，可直接了解瘘孔位置

E.产后1周时如发现尿瘘，即行修补

（）环境污染少，在当今被称为21世纪的绿色工程。

A.混凝土结构

B.钢结构

C.木结构

D.砖石结构

管路系统的特性曲线是随着（）的增加而上升。

A、流量

B、扬程

C、轴功率

D、效率