In the lecture, the professor told his students how to write an () of a graduate paper, expressing the main argument. ( 章节：2 难度：2)_做题室

单项选择题In the lecture, the professor told his students how to write an () of a graduate paper, expressing the main argument. ( 章节：2 难度：2): A、account; B、abstract; C、application; D、address

正确答案：B
答案解析：
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