● 某 Web 网站向 CA 申请了数字证书。用户登录该网站时,通过验证 (42) ,可确认该数字证书的有效性,从而 (43) 。 (42) A. CA的签名 B. 网站的签名 C. 会话密钥 D. DES密码 (43) A. 向网站确认自己的身份 B. 获取访问网站的权限 C. 和网站进行双向认证 D. 验证该网站的真伪
【单选题】Find the sentence that is closest in meaning to the one given for each question. These activities will help students improve their reading and understanding skills. We must remember what happened in t...
A.
If we could remember the past, it would not happen again.
B.
Since we all tend to forget what happened in the past we do the same mistakes again.
C.
We couldn't remember what happened in the past so we did it again.
D.
In order not to repeat the past, we should certainly not forget what happened then.
E.
Those who couldn't remember what happened in the past were more likely to repeat it.