属于防止口令泄露的措施有（）
A、口令从来不被再现在终端上
B、限制一个终端上非法认证次数
C、将实时延迟插入到口令验证中
D、限制口令长度
参考答案：A
"You'll have to wait for two hours, ________ is, at about 11; 30, ________ the medical report will
come out, "the doctor said to me.[ ]
A. that; when
B. which; that
C. that; which
D. it; whose
3，3，12，21，165，( )
A．649
B．606
C．289
D．343
