将一首mp3音乐的原始人声消除，可以使用Audition的功能是（）
A、录音
B、降噪
C、混缩
D、重混缩

单项选择题A connected graph G has an Euler circuit if and only if ________. A、Each of all vertices has degree more than 2. B、 Each of all vertices has degree more than |V| 2 C、Each of all vertices has even degree. D、Each of all vertices but only two has even degree.

单项选择题[FeF6]3-为外轨型配合物。其中心原子的杂化轨道类型和磁矩为： A. 4s14p34d2；5.75µB B. 3d24s14p3；1.73µB C. 4s14p34d2；1.73µB D. 3d24s14p3；5.75µB