题目内容:
Impliesbutnotstated:______________.
A.Someexchangesprovidemarketservicesforseveralkindsofproducts B.Theroleofthegovernmenthasbeenanimportantfactorincurbingdishonestpracticesontheexchanges C.Investinginsecuritiesisunwise D.Buyingandsellingsecuritiesisdishonest
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答案解析: