2. 外语
  3. There are only two ways to gather information from human subjects about what they are currently doing, thinking, or feeling. On

There are only two ways to gather information from human subjects about what they are currently doing, thinking, or feeling. On

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问题     There are only two ways to gather information from human subjects about what they are currently doing, thinking, or feeling.  One way is to【C1】______  what they do, the technique of observation; the【C2】______  is to ask them, the technique of surveys. Many【C3】______  included in each type of technique【C4】______  several advantages and【C5】______  . Firms frequently use【C6】______  techniques to minimize【C7】______.
    There is a great variety of observational studies. A researcher stands near the entrance【C8】______  a theatre and observes the approximate age and sex of patrons【C9】______  the theatre during certain times of the day and days of the【C10】______. Researchers comb through the garbage【C11】______  of Arizona residents to【C12】______  what is being thrown【C13】______  and, by inference from packages,【C14】______  is being bought. Toy manufacturers watch【C15】______  behind one-way mirrors to see how children【C16】______  to and play【C17】______  prototypes(样品) of toys they are thinking of introducing. Observers in public places -- airports,【C18】______  offices -- watch to see【C19】______  subjects read newspapers and magazines. Researchers call【C20】______  households and take a "pantry audit" to learn the quantity and brands of certain items on the kitchen or bathroom shelves.
【C19】
选项 A、which
B、what
C、how
D、when
答案C
解析
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大学英语四级

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