问题 单项选择题

为了验证带数字签名邮件的合法性,电子邮件应用程序(如Outlook Express)会向______。

A.相应的数字证书授权机构索取该数字标识的有关信息

B.发件人索取该数字标识的有关信息

C.发件人的上级主管部门索取该数字标识的有关信息

D.发件人使用的ISP索取该数字标识的有关信息

答案

参考答案:A

解析:为了验证带数字签名邮件的合法性,电子邮件应用程序(如OutlookExpress)会向相应的数字证书授权机构索取该数字标识的有关信息。

多项选择题
阅读理解

阅读理解。

      We may be very pleased with the rapid progress we have made in every field of study. But the

way to test a student's knowledge and ability still remains as poor as it was, We have almost done

nothing to improve our examination system.

      It is well known that the examination system we are now using may be a good way of testing a

student's memory, but it can tell you nothing about a student's ability. It does no good to students

and teachers.

      As soon as a child begins school,he enters a world of examination that will decide his future of job.

      In fact a good examination system should train a student to think for himself. But it now does

nothing about that. So students are encouraged to member what is taught. It does not enable them to

gain more and note knowledge. The students who come out first in the examination often may not be

the best in their studies. 

     Besides, the examinations often force teachers to train students what to do with the coming

examination from time to time. There must be some simpler and better way to test a student' s ability

besides knowledge. And that is what we should do at once.

1. Now little has been done to________.

A. decide a student's job

B. test a student's ability

C. test a student's knowledge

D. test a student's memory

2. The examination system we are now using can only make the students________.

A. gain more and more knowledge

B. make rapid progress

C. remember what is taught

D. think for themselves

3. In order to make students gain high marks in the coming examination, teachers have to________.

A. develop their students' ability

B. fill their students' heads with much information

C. teach freely

D. teach their students how to study

4. The passage tells us about the importance of________.

A. getting examination system improved

B. taking examinations

C. testing a student' s knowledge

D. working hard at all lessons