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阅读以下说明，回答问题1-5，将答案填入答题纸对应的解答栏内。 [说明] 某单位在部署计算机网络时采用了一款硬件防火墙，该防火墙带有三个以太网络接口，其网络拓扑如下图所示。 防火墙包过滤规则的默认策略为拒绝，下表中给出了防火墙的包过滤规则。若要求内部所有主机能使用IE浏览器访问外部IP地址202.117.118.23的Web服务器，为表中(1)～(4)空缺处选择正确答案，填写在答题纸的相应位置。 序号策略 源地址 源端口 目的地址 目的端口 协议 方向 1(1) (2) Any202.117.118.23 80 (3) (4)
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Some people believe that you have to be a special kind of person to sell a product. But although it is clear that a successful salesman does need special talents and an open personality, many of the skills be uses are used by us all.We build and keep relationships with different kinds of people, we listen to and take note of what they tell us and don’t just enjoy the sound of our own voices, and we explain things to them or discuss ideas with them.In the same way, any company needs to establish a personal relationship with its major clients and potential customers. It is often said that "people do business with people": a firm doesn’t just deal impersonally (没有人情味地) with another firm. A person in the buying department regularly receives personal visits from people representing the firm’s suppliers (供应商)—or in the case of department stores or chain stores, a team of buyers may travel around visiting their suppliers.Keeping sales people "on the road" is much more expensive than employing them to work in the office, Much of the sales people’s time is spent unproductively traveling. Telephone selling may use this time more productively, but a face-to-face meeting and discussion is much more effective. Companies involved in the export trade often have a separate export sales force. Its travel and accommodation expenses may be very high. As a result, servicing overseas customers may often be done by phone, telex (电传)or letter, and personal visits may be less often. Many firms appoint an overseas agent or distributor (分销商) whose own sales force takes over responsibility for selling their products in another country The phrase "on the road" in the last paragraph can be best replaced by（）.
阅读以下说明，回答问题1-4。 现有这样一个关系，用来表示某工厂工人家庭的信息。记录每个工人的工作证号、姓名和家庭住址，还包含他/她的每个孩子的身份证号、姓名和年龄，以及他／她所拥有的每部电话的电话号码和型号。 已知：有一些人可能有很多部电话，这些电话可能是同一型号，也可能不是同一型号；有一些人没有电话；如果某人有电话，他的每部电话都有一个电话号码。有一些人可能有很多个孩子，有一些人没有孩子。 初步设计的关系模式如下：R(身份证号，姓名，家庭住址，H身份证号，H姓名，H年龄，电话号码，型号)，其中“H身份证号，H姓名，H年龄”分别是孩子的身份证号、姓名和年龄。 [问题2] 请将该关系模式分解成第三范式的关系模式，确定主关系键。
内部网络经由防火墙采用NAT方式与外部网络通信，为下表中(5)～(7)空缺处选择正确答案，填写在答题纸的相应位置。 源地址源端口 目的地址 协议 转换接口 转换后地址 192.168.1.1/24Any(5)Any(6)(7)
| 192.168.1.0/24 |
B.
| any |
C.
| 202.117.118.23/24 |
阅读以下说明，回答问题1-3。 在图书馆数据库有三个基本表：书目表Cata(书号Cno、书名Cname、作者Cauthor、出版年Cdate、价格Cprice)、学生表Student(学号Sno、姓名Sname、性别Sgender、专业Sdept)和借书历史表Borrow(所借书号Cno、借书者学号Sno、借书日期Bbdate、还书日期Brdate)。 [问题2] 请用SQL实现如下操作： (1)图书馆里已有的鲁迅著作的名称 (2)按借书日期列出学生李明的所借书名 (3)往学生表Student中插入一个学生记录。(学号：132，姓名：张华，性别：男，系别：计算机) (4)把《野火集》的价格修改为15元
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