胃肠解痉服用
A．1天B．3天C．5天D．1周E．1个月 非处方药限定疗程为
参考答案：A
Mary often goes to school by bus but _______ her father drives her to school. [ ]
A. sometimes
B. some times
C. sometime
D. some time
标准正态分布曲线下区间(-∞，+1)所对应的面积为（）
A.15.86％
B.31.73％
C.68.27％
D.84.14％
E.需查u界值表
