下述字典中,其中rating的value的值,是电影的评分值,titile是电影的名字,若想获取电影“无双”的评分值,正确的代码是() my_dict={ "count":2, "start":0, "subject_collection_items":[{ "rating":{"count":11223,"value":5.2}, "title":"铁血战士", "year":2018, "actor":["波伊德·霍布鲁克", "·罗兹", "雅各布·特伦"] },{ "rating":{"count":244502,"value":8.1}, "title":"无双", "year":2018, "actor":["", "", ""] }] }