下列各项中，根据企业破产法律制度的有关规定，属于破产债权的有( )。
A．破产宣告前成立的无财产担保的债权
B．放弃优先受偿权利的有财产担保的债权
C．破产宣告前对债务的罚款
D．破产宣告时对破产企业未到期的债权
参考答案：A,B,D
解析： 依据《破产法》的有关规定，破产宣告前成立的无财产担保的债权和放弃优先受偿权利的有财产担保的债权为破产债权。A、B选项符合要求。同时，破产宣告时对破产企业未到期的债权，视为已到期债权，也属破产债权。而破产宣告前对债务人的罚金、罚款，不能作为破产债权追缴，以免使原对债务人所作的处罚转移到全体破产债权人身上。
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