马克思主义的科学性和革命性之间的关系是什么？

What tense should be used in the main clause when the subordinate clause begins with 'If medical costs had been controlled'?

根据文章，下列哪项是影响他人有效性的关键因素？

Lambda表达式的语法中，箭头符号“->”的作用是什么？

A research paper explores the impact of different writing styles on reader comprehension. One study presented two groups with texts on the same subject but written using contrasting approaches: one group received a text with predominantly complex sentences and abstract vocabulary, while the other received a text with simpler sentence structures and more concrete terms. Based on the principles of effective communication, which outcome would be MOST likely?