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【单选题】
《产品质量法》要求产品或者其包装上的标识必须真实，并符合如下要求（）A.
所有产品必须标有产品质量检验合格证明
B.
所有产品必须标有生产产地
C.
所有产品必须标有生产日期和安全使用期或者失效日期
D.
所有产品必须标有警示标志或者中文警示说明
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A.
across
B.
cross
C.
crossing
D.
crossed
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