第13题: [单项选择]The author suggests that the best time to start a second language be______ A. any time one feels like to B. not until one grows up C. as early as possible D. before ten 参考答案:D 答案解析:根据文章第一段第一句Experts say children can begin learning a second language in preschool,and should begin be
第14题: [单项选择]切口疝最常发生在哪种切口() A. 麦氏切口 B. 肋缘下切口 C. 经腹直肌切口 D. 中切口 E. 旁正中切口 参考答案:E