-Do you spend a lot of time _______ computer? -No, but I spend much time _______ doing my homework. A. on, in B. in, on C. on, on D. in, in 答案:A1体积某气态烃只能与1体积氯化氢气体发生加成反应,生成氯代烷。1mol此氯代烷可与5mol氯气发生完全的取代反应,则该烃的结构简式为( ) A、CH2=CH2 B、CH3CH=CH2 C、CH3CH3 D、CH3CH2CH=CH2