单项选择题
A.烷烃B.环烷烃C.芳烃D.烯烃
A.R′COORB.RCOOR′C.RCOOH+RCOOR′D.R′COOR+RCOOH
A.20℃±3℃;20mLB.25℃±3℃;20mLC.20℃±3℃;50mLD.25℃±3℃;50mL