Researchersareplacingroboticdogs（机器*）inthehomesoflonely...
问题详情：Researchersareplacingroboticdogs（机器*）inthehomesoflonelyoldpeopletodeterminewhethertheycanimprovethequalityoflifeforhumans.AlanBeck,anexpertinhuman-animalrelationship,andNancyEdwards,aprofessor...