由于面谈调查是直接与被调查者进行面对面交谈，调查结果容易受到（）因素的影响。
A.调查人员的工作态度
B.费用
C.时间
D.调查范围
参考答案：A
—I’m sorry, but the manager isn’t here yet. Shall I have him call you when he comes back?
—No, I’ll call him later. If I call again in half an hour, do you think he ____?
A．arrives
B．has arrived
C．will arrive
D．will have arrived
不能检测下腔静脉血栓的方法是（）
A.MRI
B.X线平片
C.DSA
D.CT
E.超声
