按明文的处理方法密码系统可分为：分组密码和______。
参考答案：序列密码
— Where was it ________ you met Mr. Brown for the first time?
— It was in the house ________ I was born.[ ]
A. where; that
B. /; that
C. in which; where
D. that; where
躯体疾病所致的精神障碍与原发躯体疾病的病情在程度上有平行关系，在时间上常有先后关系。()
