皮皮学，免费搜题
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搜题
【单选题】
限期使用的产品，应标明生产日期和安全使用期或者标明（）A.
保质期
B.
保存期
C.
失效日期
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
举一反三
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