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It______on the Internet with respondents who volunteered to participate, and was not a scientifically random survey.
It______on the Internet with respondents who volunteered to participate, and was not a scientifically random survey.
admin
2013-03-23
96
问题
It______on the Internet with respondents who volunteered to participate, and was not a scientifically random survey.
选项
A、were conducting
B、were conducted
C、had been conducted
D、had conducted
答案
C
解析
转载请注明原文地址:https://www.kaotiyun.com/show/R4hK777K
0
专业英语四级
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