A: :2﹣乙基丙烷
B:CH3CH2CH2CH2OH:1﹣丁醇
C: :间二甲苯
D: :2﹣甲基﹣2﹣丙烯
On June 1st, 2015, the “Oriental Star(东方之星号)” turned upside down. People all over the world ______.
下列命题正确的是( )