A.離子型好B.兩者差不多C.兩者都很差D.非離子型好
A.揮發(fā)性B.凝固點(diǎn)C.著火點(diǎn)D.密度
A.10~20,0.81~0.83B.18~25,0.82~0.85C.15~18,0.74~0.95D.15~18,0.71~0.95