Dogsareknownfortheirsenseofsmell．Theycanfindmissingpeop...
問題詳情：Dogsareknownfortheirsenseofsmell．Theycanfindmissingpeopleandthingslikebombsandillegaldrugs．Nowastudysuggeststhattheanimalknownasman’sbestfriendcanevenfindbladder（膀胱）cancer．Cancercellsarethoughtt...