Pay-for-knowledgeplatformsandapps,includingWeiboandZhih...
問題詳情：Pay-for-knowledgeplatformsandapps,includingWeiboandZhihu,①__________allowpeopletopaymoneytohavetheirquestionsansweredbyprofessionalsorseeonlineanswersprovidedtoothers,②__________(be)becoming...