受调查者

调查者运用统一设计的问卷向受调查者了解情况或征询意见的调查方法是（)。A.文献调查法B.实地观

调查者运用统一设计的问卷向受调查者了解情况或征询意见的调查方法是()。

A.文献调查法

B.实地观察法

C.访问调查法

D.问卷调查法

所有受调查者中，最多人选择的业余生活选项是（）。
A户外运动
B上网
C看书
D听收音机、看电视

（）是根据受调查者提供的信息，进一步对其他相关人员进行调查，直至满足样本量要求为止。
A、任意抽样
B、判断抽样
C、配额抽样
D、滚雪球抽样

在市场调查的方法中，邮寄调查法的优点包括()。 A:调查区域较广泛B:调查费用较低C:被调查者时间充裕D:被调查者不受调查者影响E:得到的资料真实

One of Britain"s few distinctive contributions to world culture may come to an end, according to a survey that suggests holiday postcards are more and more given up because of emails and instant messages in mobile phones.More than half of the 1000 holiday-makers interviewed said they had decided to send fewer cards, turning instead to their electronic rivals. A quarter of the respondents (受调查者) regard postcards as old-fashioned and slow to arrive. A further 14% admitted that thinking of something to fill the space was too challenging, compared with a call home.Although officially invented by a Hungarian, Emanuel Herrmann, in 1869, the idea of illustrated cards was taken up with most enthusiasm in Victorian Britain, joining Gothic architecture and landscape gardening as fields for which the country was famous."If the British postcard did disappear, we would lose forever something of great importance to the nation, "said Chris Mottershead of Thomson Holidays, which did the survey. He was backed by Marie Angelou of Sussex University, who has investigated the importance of sending and receiving postcards. "Postcards are nothing like phone calls, instant messages and direct photo shots via the mobile, "she said. "All these are useful, practical devices, but postcards offer something else, something additional that is not simply functional, but imaginative and personal. They can create the real atmosphere of your holiday in a way that nothing else can do. They are also for more than a moment—with some people adding them to collections built up over years and years.Who first got the idea of illustrated cards？A．Emanuel Herrmann.B．Victorian Britain.C．Chris Mottershead.D．Marie Angelou.

题目某单位在林和张两位候选人中民主选举经理。在选举的前十天进行的民意测验显示，受调查者中36%打算选林，42%打算选张。而在最后的正式选举中，林的得票率是52%，张的得票率仅是46%。这说明选举前的民意测验在操作上出现了失误。以下哪项如果是真的，最能削弱上述论证的结论？（   ）
A:选举前二十天进行的民意测验显示，林的得票率是32％，张的得票率是40％
B:在进行民意测验的时候，许多选举者还没拿定主意选谁
C:在选举的七天前，林为厂里要回了30万元借款
D:林在竞选中的演说能力要比张强

题目一项对3.7万名年龄在49至75岁之间的某国男性进行的跟踪调查发现，10年中，这些男性里有近2000人得过中风，那些经常食用巧克力的受调查者与少量食用甚至不食用巧克力的人相比，患中风的风险要低不少。研究人员推测，经常食用巧克力可降低中风风险。
以下哪项如果为真，最能支持上述研究人员的推测（  ）。
A:巧克力含有黄酮类化合物，而它具有预防中风的功效
B:研究人员对女性的类似调查结果与上述研究结果基本一致
C:研究发现，经常食用巧克力可调节低血糖患者体内的血糖含量
D:在此项调查中，得过中风的男性患者中部分人有经常食用巧克力的习惯

[单选]一项对3.7万名年龄在49至75岁之间的某国男性进行的跟踪调查发现，10年中，这些男性里有近2000人得过中风；那些经常食用巧克力的受调查者与少量食用甚至不食用巧克力的人相比，患中风的风险要低不少，研究人员推测，经常食用巧克力可降低中风风险。以下哪项如果为真，最能支持上述研究人的推测？
A．研究发展，经常食用巧克力可调节低血糖患者体内的血糖含量
B．研究人员对女性的类似调查结果与上述研究基本一致
C．巧克力中含有黄酮类比化合物，而它具有预防中风的功效
D．在此项调查中，得过中风的男性患者中部分人有经常食用巧克力的习惯