[浙江诸暨中学2021高二月考]下列物质中存在顺反异构体的是-|||-()-|||-A. (H)_(3)C=CHC(H)_(2)C(H)_(3) B. (H)_(2)=C-C(H)_(3)-|||-CH3 Cl-|||-CH3-|||-H3C -C(H)_(3)-|||-C. (H)_(3)C(H)_(2)C=CC(H)_(2)C(H)_(3) D. C=C-|||-Cl CH(CH3)2-|||-Br Br