请根据以下内容回答下列各题 A—securities businessI—investment trust B—stock exchange corpor
请根据以下内容回答下列各题 A—securities business I—investment trust B—stock exchange corporationJ—stock-jobber C—quotationK—stock company D—share L—securities E—shareholderM—common stock F—dividendN—preference stock G—cash dividend O— income gain H—stock investmentP—issue Q—par value S—closing price R—opening price Examples:(I)投资信托(L)有价证券 ()证券公司()普通股