离心泵在出口阀关闭期间运行时间一般不要超过（）分钟。
A.10
B.20
C.5
D.3
参考答案：D
What a low opinion she ___ of him! He doesn't think it much good ___ friends with her. [ ]
A. thinks, to make
B. has, making
C. thinks , making
D. has, to make
根据民法基本理论，下列选项中属于法人的是( )。
A．某公司技术部B．某大学文学系C．某机关人事科D．某股份有限公司
