财务费得取费标准与（）有关。A、施工企业级别 B、工程类别 C、工程项目专业 D、资

输尿管结石的主要症状为

A．无痛性全程血尿
B．肾绞痛+镜下血尿
C．尿痛、尿频
D．排尿困难
E．尿失禁

简述暖管时升温速度对管道水击的影响。

硕士研究生撰写开题报告之前应阅读文献至少（）篇。

A.15篇

B.25篇

C.50篇

审美标准倾向的底线要求是（）。

A.无低级错误

B.无磕磕绊绊

C.均匀

D.整齐

Passage Three

Who is Donald Kroodsma a. The author of the book called The Singing Life of Birds. b. The scientist of a program called The Singing Life of Birds. c. The author of the magazine called The Singing Life of Birds. d. The professor of a University studying The Singing Life of Birds.