单选题：Whatcanbeinferredfromthenewstudiesoftears?

题目分类：英语六级
题目类型：单选题
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题目内容：

Whatcanbeinferredfromthenewstudiesoftears? A．Emotionaltearshavethefunctionofreducingstres
B．Exposuretoexcessivemedicationmayincreaseemotionaltear
C．Emotionaltearscangiveriseto“dryeye”syndromeinsomecase
D．Environmentalpollutantscaninducethesheddingofemotionaltear

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