工程建设监理实施需要( )。
A．上级主管部门批准
B．项目法人委托和授权
C．建设单位委托和授权
D．建设主管部门批准
参考答案：B
教育者
The feeling of competition among the students in all the classrooms where the test was going on was noticeable to everyone. ()
A. discord
B. discovery
C. rivalry
D. cooperation
