研究设计论文的引言与大多数学术论文的引言相似。该部分应该介绍论文的主题。这意味着提供一个关于该主题的定义和背景信息，可以作为论文的钩子。引言还应该说明研究的意义。 In this particular Element of the training, you may use this Resource to assist you to overlay two levels symbolizing roadways in addition to a background aerial photo to the central spot of downtown London, Ontario. You mig... https://thesocialintro.com/story12887137/detailed-notes-on-%E4%BB%A3%E5%86%99%E8%AE%BA%E6%96%87