多项选择题 以下公主线衣身，前后袖窿平衡的有（）。 A、A B、B C、C D、D

单项选择题 According to Rene Wellek, literary studies can be divided into ____ and _____. A、formal research and aesthetic research B、internal research and external research C、C. cultural criticism and narrative research D、textual research and contextual research

单项选择题 图中的主视图没有漏线。 A、正确 B、错误