A:它是缩聚反应的产物
B:其单体是CH2CH2和HCOOCH3
C:其链节是CH3CH2COOCH3
D:其单体是CH2CHCOOCH3
注释:甲图中最高点为10cm,横坐标单位为m;乙图中横坐标为t(10﹣2s)
My bike is broken, so I have to go to school _________ my mother's.