Dogs act like toddlers when you need help - but cats just watch. Scientists compared 3 groups: pet dogs, cats, and human toddlers in an experiment where a human parent hides and pretends to look for an object. 75% of dogs and children helped. Cats only helped if it was in their personal interest.

· · 来源：study资讯

After determining the result output a JSON with two fields:

Presenter: Chris Vallance

特朗普關稅被法院推翻後，详情可参考WPS官方版本下载

It offers an unlimited download limit。业内人士推荐heLLoword翻译官方下载作为进阶阅读

Answer (Playground):

Татьяна На

Steve O'Farrell has lost more than five stone (34kg) since using weight loss injections