对调查人员的监控一般利用（）来判断调查人员访问的真实性。
A.现场监督
B.审核问卷
C.电话回访
D.实地复访
参考答案：A, B, C, D
保安员国家职业标准是什么？
You may use my office as you like, you clean it up afterwards.
A．as if
B．as well as
C．as soon as
D．so long as
