题目

某高校研发的幽门螺旋杆菌疫苗，对该菌引发的胃炎等疾病具有良好的预防效果。实验证明，一定时间内间隔口服该疫苗3次较1次或2次效果好，其主要原因是A. 能多次强化刺激浆细胞产生大量的抗体B. 能多次强化刺激记忆细胞迅速增殖分化C. 抗原的积累促进B细胞释放大量淋巴因子D. 能增强体内吞噬细胞对抗原的免疫记忆My father ______ my mother when they were both 26 years old, and they have ______ for 15 years.A．married to; been marriedB．married with; been marriedC．was married; been marriedD．married; been married