Theproposal that smart devices should carry security labels was introduced a -组卷网

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The proposal that smart devices should carry security labels was introduced a voluntary basis at first, which _______the research findings that these devices were able to put consumers' privacy and security at risk.

A．on, based on	B．by, based on
C．on, was based on	D．by, was based on

20-21高三上·广东广州·阶段练习

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