按国际工程项目建筑安装工程费用的构成，直接费由( )组成。
A．风险费
B．施工机械使用费
C．材料费
D．设备费
E．人工费
参考答案：B,C,D,E
— Whom did you ________ the packet at the post office?
—Jack. There________ masses of work for him to do, but he managed to finish the work as required.[ ]
A. have fetched; was
B. have fetch; were
C. have to fetch; were
D. have fetch; was
下列哪项对于诊断早期糖尿病肾病最有意义（）
A.尿常规检查
B.尿微量白蛋白测定
C.尿渗透压测定
D.双肾B超
E.肌酐清除率
