题目

American women were _____ the right to vote until 1920 after many years of hard struggle.A. ignored       B. refused       C. neglected       D. denied   答案：Ddeny 否认,不给予;Lots of people were denied the right to vote.(许多人被剥夺了选举权。)饱和一元醛CnH2nO若还原产物没有同分异构体时，n值为________．饱和一元醇CnH2n+2O有同类化合物同分异构体时，n值最小为________，若能发生消去反应时，n值最小为________，若不能发生消去反应时，n值(n＝1)除外最小为________．能发生加成反应的有机物，分子中碳原子数最小为________．