UPS并机均流的基本条件：并机的基本原理就是保证U1-U2=0，具体体现为：相同的电压幅值。
参考答案：错
在建设工程施工合同法律关系中，法律关系的客体是( )。
A．建筑物
B．施工工程技术
C．施工工程款
D．工程施工行为
My mother was . I had to look after her . [ ]
A. in hospital, in hospital
B. in the hospital, in hospital
C. in hospital, in the hospital
D. in the hospital, in the hospital
