7.完成下列反应式。-|||-(1) (H)_(2)=CH-C(H)_(2)=C(H)_(2)+C(H)_(3)=CH-CHOxrightarrow (Delta )-|||-CH- -C、-|||-(2) (H)_(2)=CH-CH=C(H)_(2)+ O-|||-CH-C-|||-O-|||-(3) (H)_(2)=CH-CH=C(H)_(2)+C(H)_(2)=CH-CNxrightarrow (Delta )-|||-(4) (H)_(2)=C-CH=C(H)_(2) 聚合-|||-Cl