单项选择题
Thầy Minh đã giảng ngữ pháp rồi.
问答题Thầy Minh đã giảng ngữ pháp rồi.
哪一种方法不能保证提高火焰温度?A.预热燃料 B.去除氮气 C.增加燃料。 D.增加氧气
单项选择题哪一种方法不能保证提高火焰温度?
Which of the following is NOT the move in a PS? A、Justi...
单项选择题Which of the following is NOT the move in a PS? A、Justifying choice B、Linking to personal experience C、Describing academic qualifications D、Drawing readers' attention