问答题：试题四（共 20 分）阅读以下说明，回答问题1 和问题2，将解答填入答题纸的对应栏内

题目：

试题四（共 20 分）阅读以下说明，回答问题1 和问题2，将解答填入答题纸的对应栏内。【说明】电脑经销商甲欲采购一批电脑，他从某大型电子商务网站看到了电脑供应商乙的供应信息，于是利用该电子商务网站平台与其进行了在线洽谈，达成购买意向，并利用该网站的电子采购功能签订了电子合同。同时通过银行的企业网上银行功能实现了货物资金结算，网站采用SSL 协议保证交易的安全性。

【问题 2】（10 分）1．该电子商务网站提供的电子商务服务属于（11）模式。A．C2C B．B2C C．B2B D．B2G2．为了验证电脑供应商乙的身份，电脑经销商甲要求其提供数字证书，以下描述正确的是（12）。A．电脑经销商甲无法知道数字证书的版本信息B．电脑经销商甲能够验证给电脑供应商乙颁发数字证书的CA 的数字签名C．电脑经销商甲可通过证书中电脑供应商乙的私钥验证其真实身份D．电脑经销商甲必须出示自己的数字证书才能验证电脑供应商乙的身份3．在基于SSL 协议的交易过程中，电脑经销商甲的购买信息首先发往（13）。A．发卡行 B．收单行 C．电脑供应商乙 D．CA 认证中心4．基于SSL 协议提供的安全服务不包括（14）。A．客户机和服务器间传递信息的保密性B．客户机和服务器间传递信息的完整性C．客户机和服务器间传递信息的不可抵赖性D．客户机和服务器的身份认证5．SSL 协议的通信过程主要包括以下几个阶段：①协商会话密钥 ②身份认证 ③申请建立会话④会话（数据传输） ⑤会话结束正确的步骤是（15）。A．①②③④⑤ B．②①③④⑤C．②③①④⑤ D．③②①④⑤

答案：

参考答案：(11)C (12)D (13)C (14)C (15)D

完形填空.
It was Mother's Day. I was so busy with my work that I couldn't 1 back home. When I passed by a 2 shop, a(n) 3 came to my mind, "I'll send Mum some roses." While I was 4 my flowers, a young man went inside. "How many roses can I get 5 only five dollars, Madam?" he asked. The assistant was trying to tell him roses were as 6 as forty dollars a dozen - maybe he would be happy with carnations(康乃馨). "No, I 7 have red roses." he said, "my mum was 8 ill last year and I didn't spend much time with her. Now I want to get something special, roses, as rose is her ." After hearing it, I said I would pay 10 of the money for the young man. 11 by both of us, the assistant said, "Well, lovely young man, thirty dollars a dozen, only for you." Taking the roses, the young man almost jumped into the 12 and ran out of the shop. It was 13 worth twenty-five dollars I paid to see the exciting 15 . Then I paid for my dozen of roses and told the assistant to 14 them to my mother. As I walked out, I felt 16 . Suddenly I saw the young man crossing the street and going into a park. But soon I 17 it was not a park 18 a cemetery(公墓). Crying, the young man carefully 19 the roses, "Mum, why didn't I tell you how much I loved you? God, please help me find my mum and tell her I love her." Seeing this, I turned and quickly walked to the 20 . I would take the flowers home myself.
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