下列8种有机物：①CH2===CH2；② ；③C2H5OH；④CH3CH2Br；⑤CCl4；⑥CH3COOCH3；⑦CH3COOC2H5；⑧CH3CH2COOH。根据官能团的不同可分为（）

A.CH3OCH3

B.CH2=CH2

C.CH3CH2CH3

D.HCOOH

A.CH3OCH3

B.CH2=CH2

C.CH3CH2CH3

D.HCOOH

A.CH3OCH3

B.CH2=CH2

C.CH3CH2CH3

D.HCOOH

A.4类

B.5类

C.6类

D.7类

A.H3CH2OH

B.H3COOH

C.H2=CH2

D.H2=CHCl

A.CH≡C─CH3

B.CH2＝C＝CH2

C.CH2＝CH─CH3

D.CH≡C─CH＝CH2

E.C6H6

F.C3H8

A.CH≡C─CH3

B.CH2=C=CH2

C.CH2=CH─CH3

D.CH≡C─CH=CH2

E.C6H6

F.C3H8

A.H3CH2CH2CI和CH3CHCICH3

B.H4和CH3CH2CH2CH3

C.H3CH3和CH2=CH2

D.H3CH2OH和CH3COOH

A.CH≡C─CH3

B.CH2＝C＝CH2

C.CH2＝CH─CH3

D.CH≡C─CH＝CH2

E.C6H6

F.C3H8

A.C3H7Cl

B.C5H12

C.C4H8

D.H2C===CH2—CH3