【多选题】某烃和氢气加成后得到2,2-二甲基丁烷,该烃的名称可能是( )
【多选题】在物体的三视图中,俯视图反映物体的( )度和( )度。
【简答题】Marie is waiting for Tom in the restaurant when he arrives late. Marie: Hi. There will be two of us....Thank you.... Tom: Marie! I’m really _______ . How _____ have you been waiting? Marie: It’s ____ ...
【单选题】某炔烃加氢后得2-甲基丁烷,该炔烃可能是
【单选题】某炔烃加氢后得2-甲基丁烷,该炔烃可能是