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【单选题】
( )是调查员凭借自己的感官和各种记录工具,深入调查现场,在被调查者未察觉的情况下,直接观察和记录被调查者行为,以收集市场信息的一种方法。A.
商品交易法
B.
电话访谈法
C.
访问法
D.
观察法
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反馈参考答案：
举一反三
【多选题】Mark Twain had led an active life in the very center of the American experience. He had been a____________ .
A.
printer, pilot, soldier
B.
silver-minor, gold-washer
C.
lecturer, traveler, businessman
D.
novelist, autobiographer
【单选题】Few people believed the dam had been burst because there had been too many false alarms.
A.
Y
B.
N
C.
NG
【简答题】链传动的类型为（）链传动、（）链传动、（）链传动。
【单选题】Fewer people would have died if______.
A.
more announcements had been made
B.
people hadn't used the lifts
C.
the people had obeyed the office
D.
the incident had happened on a weekend
【简答题】链传动的类型为___链传动、___链传动、____
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