如题所述
甲烷:CH₄乙烷:CH₃CH₃丙烷:CH₃CH₂CH₃丁烷:❶CH₃CH₂CH₂CH₃CH₃ | ❷CH₃CH₂CHCH₃戊烷:❶CH₃CH₂CH₂CH₂CH₃CH₃ | ❷CH₃CH₂CHCH₃CH₃ | ❸CH₃CCH₃| CH₃