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