"重阴必阳，重阳必阴"阐释了何种机理（）
A.阴阳对立制约
B.阴阳互根互用
C.阴阳交感与互藏
D.阴阳消长平衡
E.阴阳转化
参考答案：E
选择合适的单词填空。
1. Li Ming's uncle is a _________.
2. My mother is a beautiful_________.
3.I have a brother. He is only one year old. He is a__________.
4. My sister is a pretty _______. She is seven years old.
对于密码分析的结果来说，（）是指攻击者能够区别加密算法和随机排列。
