WhydopeoplecryScient的精選

問題詳情：任務型閲讀，閲讀下文並回答問題。Whydopeoplecry?Scientistssaythebodyproducestearsbecausetheyneedthem.Onekindoftearsisfortheeye,theotherisfortheheart.Theybothworkascleaners.Ifsomethingelselikedust...