______是一个人立身处事的最基本的道德规范。[ ]
A.诚信
B.磨练坚强意志
C.孝
D.养成好习惯
答案:A
— I told you that he would come to see you.
— Actually I had little doubt _____ it was true. [ ]
A. that
B. whether
C. since
D. if
成人缺铁性贫血最常见的病因是
A.胃及十二指肠术后
B.慢性萎缩性胃炎
C.摄入不足
D.慢性失血
E.需要量增加