关于电子政务系统的可信时间戳服务系统，下列说法不正确的是( )。A．可信时间戳服务系
题型：单项选择题
问题：
关于电子政务系统的可信时间戳服务系统，下列说法不正确的是( )。
A．可信时间戳服务系统主要为实现业务处理的抗抵赖性提供基础
B．可信时间戳服务系统主要提供可信时间服务和时间戳服务
C．可信时间服务是为时间戳服务提供可信时间服务，监控并校准后者的时间
D．可信时间服务是为各种应用系统和用户提供可信的时间服务
题型：单项选择题
信息匹配
下面是有关专家的详细信息, 请阅读下列相关信息, 并按照要求匹配信息.
1. Mr. Chen Fang, executive manager of the sales Department of Tianhua Trading Company, one of the
leading companies in Shanghai, will give us a presentation this afternoon. Sales of the products have
grown astonishingly since Mr. Chen took charge of the department in July, 1992. The products are
exported to many countries and regions of the world. Mr. Chen has been credited with miraculous powers.
2. Local employers in the city send Linda Smith a list of job openings at their companies. Her task is to
interview unemployed persons, find out their backgrounds, job skill and future plans. Then she searches
through her list of openings to find a job that is suitable for the applicant. If the employer hires the applicant, he/ she pays her agency a fee.
3. Professor George Smith, a distinguished economist from Britain, will give us a speech this afternoon.
He is one of the specialists in the economical growth of Britain, professor of Oxford University, Ph. D
from London School of Economics.
4. Mr. Frederick Row of the United Nations will give all the students a lecture tonight. Mr. Frederick
Row is an expert on the problem of overpopulation, six years' working experience in Africa and India,
author of the book We're Killing Ourselves, master's degree from Harvard, Ph. D. from Yale.
5. Adrienne Rich is going to give us a lecture. She is the author of nearly twenty volumes of poetry,
including. The School Among the Ruins: Poems 2000 - 2004 (W. W. Norton & Co. 2004), which won
the Book Critics Circle Award. She is also the author of several books of nonfiction prose. Rich has
received the Bollingen Prize, the Lannan Lifetime Achievement Award, the Academy of American Poets
fellowship, the Ruth Lilly Poetry Prize, the Lenore Marshall Poetry Prize, the National Book Award, and
the MacArthur Fellowship; she is also a former Academy Chancellor. In 1997 Adrienne Rich was
awarded the Academy's Wallace Stevens Award for outstanding and proved mastery in the art of poetry.
请阅读下面相关专家所从事职业或所作讲座的相关信息, 然后完成信息匹配:
A. He or She will give us a speech titled "Prospects of British Economy".
B. The professor will talk about this topic "The Bible, Slavery", and the "Irrepressible Conflict".
C. He or she is a job placement specialist
for the Professional Employment Agency.
D. That expert will present us "Global Management in the 1990s".
E. This specialist will give us a lecture titled "Poetry Reading and Discussion".
F. The Dr. will give us a speech titled "The Problem of Over - population in Developing Countries".