摘要： HEMA是制备软质隐形眼镜的材料.其名称是聚甲基丙烯酸羟乙酯.则合成它的单体应为 ( ) A.CH3-CH＝CH-COOH.CH2-CH2 | | OH OH CH3 | B.CH2＝C-COOH.CH3CH2OH CH3 | C.CH2＝C-COOH.HOCH2CH2OH D.CH3-CH＝CH-COOH.CH3CH2OH
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D．CH3－CH＝CH－COOH、CH3CH2OH
D．CH3－CH＝CH－COOH、CH3CH2OH