（）are those programs that help find the information you are trying to locate on the WWW.

A．Windows

B．Search Engines

C．Web Sites

D．Web Pages

证书管理功能包括证书（）替换、补发、换发、两码重发、吊销和USBKEY挂失及解锁。

A.查询

B.挂失

C.绑定

D.解绑