be exposed to中的exposed是adj还是过去分词

be exposed to中的exposed是adj还是过去分词 potatoes turn green when exposed to light.exposed是过去式还是过去分词 be exposed to be exposed to和be exposed by意思区分? be exposed to long painting tradition exposed to the elements be subjected to 与be exposed to 的区别 怎么区分expose to 和be exposed to leave sth expose to还是leave sth exposed to? be exposed to有没有体验的意思 非谓语，being exposed，exposed be exposed to与be faced with,facing with 有什么区别和联系?