【多选题】三棱锥SABC的三视图如下所示。其表面上一点M的V投影已知,则以下描述正确的有( )。【图片】
【单选题】Why shouldn't humor be used in a presentation?
A.
Because the audience might laugh at the presenter.
B.
Because the presenter might forget the main purpose of the presentation.
C.
Because the joke might offend some of the audience members.
D.
Because the audience might forget the main contents of the presentation.
【单选题】How is Rule of Three applied in a presentation?
A.
The body of a presentation is composed of no more than three paragraphs.
B.
Typically there are three parts in a presentaiton.
C.
The main idea should be repeated three times.
D.
Each idea should be supported by three arguments.
【多选题】关于社会主义基本制度确立的意义,下列表述正确的是()
A.
社会主义基本制度建立,完成了中华民族有史以来的最为广泛而深刻的社会变革。
B.
为当代中国一切发展进步奠定了根本政治前提和制度基础。
C.
实现了中华民族由近代不断衰落到根本扭转命运、持续走向繁荣富强的伟大飞跃。
【多选题】What techniques can be employed in a presentation?
【判断题】Smile is not necessary in a presentation.
【单选题】如图所示,已知三棱锥表面点D的V面投影d ́,补画其水平投影d的正确作图方法是