(8分)用系统命名法给下列物质命名:
(1) CH3CH(C2H5)CH(CH3)2______________________
(2) ______________________
(3) ______________________
(4) ______________________
(8分)用系统命名法给下列物质命名:
(1) CH3CH(C2H5)CH(CH3)2______________________
(2) ______________________
(3) ______________________
(4) ______________________