1)2CH3-(OH)CH-COOH===CH3-CH(COOH)-O-CH(COOH)-CH3+H2O(2)2CH3-(OH)CH-COOH===CH3-CH(COOH)-OOC-CH(OH)-CH3+H2O(3)2CH3-(OH)CH-COOH===CH3-CH-OOC-CH-CH3+H20＼COO /(4)nCH3-(OH)CH-COOH===〔-O-CH(CH3)-CO-〕+nH2O...