参考答案 CH CH CH H3 C H3 H3C CHa CH3 H2c C(CH3)3 (H3C)3C H (H3C)3C H (H3C)3C H CH3 HaC Hoc CH CHH3C CH3 CH3 C(CH3 )3 H3C CH3 CH3 H2C C CH3 CH3 H F H3C CH3 CH3 (H3C)3C H H3C CH3 CH3 (H3C)3C H H3C CH3 CH3 (H3C)3C H H − H H2C C CH3 CH3 参考答案