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问题 单项选择题

用户A通过计算机网络向用户B发消息，表示自己同意签订某个合同，随后用户A反悔，不承认自己发过该条消息。为了防止这种情况发生，应采用( )。

A．数字签名技术

B．消息认证技术

C．数据加密技术

D．身份认证技术

答案

参考答案：A

填空题

B Customs of Bulgaria: Marriage and Family保加利亚习俗：婚姻与家庭
The average age for women to marry is between 18 and 25.25 tend to (1) when somewhat older. A church wedding often (2) the legal civil ceremony, and a large reception, which often involves (3) music and dancing, is held in the evening. Wedding traditions include (4) money on the bride’s dress to represent future prosperity, the groom (5) the bride at her home, and the couple pulling on opposite (6) of a loaf of bread—whoever gets the largest piece will be (7) boss of the family. Honeymoons are a new tradition.
The principle (8) mutual support is valued in the Bulgarian family. The elderly are (9) cared for by their adult children. Unmarried adults live with their (10) and many newly married couples live with one set of parents (11) they are able to get housing of their own. Most families (12) urban areas live in apartments, which are in short
supply, while (13) in rural areas usually have their own houses. Many village houses (14) owned by families who live in urban areas, who use them_ (15) summer and weekend retreats, or for retired parents.
Most families in (16) areas do not have more than two children, while families in (17) areas tend to be larger. Grandparents play an important role in (18) care, particularly in urban areas, where most women work outside the (19) . Men of the younger generation have begun to help with household (20) , once considered only women’s responsibility.

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单项选择题

协调处理集体协商争议的程序是（）①调查了解争议的情况②受理协调处理申请③对争议进行协调处理④研究制定协调处理争议的方案⑤制作《协调处理协议书》

A.②①④③⑤

B.①②③④⑤

C.②④⑤①③

D.④⑤②①③
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