(require)premarketingproofofsafetyoreffectiveness.__7.If__aproductalreadyonthemarketisadangertohealth,FDAcanrequesttheproducerordistributortoremoveitfromthemarketvoluntarily,oritcantakelegalaction,includingseizure(查封)oftheproduct.Onenotablecaseafewyearsago__8.involved__(involve)anelectricaldevicecalledthe...