Whenever possible "Freephone" or similar facilities should be provided so that Respondents can check the Researcher's bona fides without cost to themselves.
时,尽可能提供"免费电话"或类似的设备,让被访者应免费查到研究人员的真实性.
Whenever possible "Freephone" or similar facilities should be provided so that Respondents can check the Researcher's bona fides without cost to themselves.
时,尽可能提供"免费电话"或类似的设备,让被访者应免费查到研究人员的真实性.
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