Among those tanning customers, it is estimated that most of them are ______. [br

游客2023-08-01 36

问题 Among those tanning customers, it is estimated that most of them are ______. [br] As a safer alternative to real tans, self-tanning products containing dihydroxyacetone (DHA)can only protect ______.

选项

答案 the top layer of skin

解析由题干中的self-tanning和DHA可以定位到第七段的前两句For those…containing dihydroxyacetone (DHA)as a safer alternative to real tans．These products simply stain the top layer of skin…[精析] 此处要填入名词性成分作宾语。从原文可知，为了让自己肤色看起来健康但又没有日晒的危险，皮肤专家推荐可以使用包含DHA的防晒产品作为日晒的替代品。这些产品只能是留在皮肤的表面，对皮肤细胞没有实质保护作用。由此得出，这种防晒产品只能保护皮肤表面，所以答案为the top layer of skin。

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