不是所有商务活动都包括信息流、资金流、物流和商流。

当北京时间为12点钟时，辽宁庄河大厦楼影指向是:

A．正南方

B．西北方

C．东北方

D．正北方

“公路工程施工索赔管理”真题案例答案解析

背景资料（07考点）：

某施工单位承接了一4×20m简支梁桥工程。桥梁采用扩大基础，墩身平均高10m。项目为单价合同，且全部钢筋由业主提供，其余材料由施工单位自采或自购。在离本工程不远的江边有丰富的砂源，经检验，砂的质量符合要求。采砂点位于一跨江大桥下游150m处，施工用砂均取自这里。项目部拟就1#～3#排架组织流水施工。

根据施工组织和技术要求，基础施工完成后至少10天才能施工墩身。

施工期间，还发生了如下事件：

事件1：由于业主大型安装设备的进场，业主委托承包商对一旧桥进行加固。加固工程中的施工项目在原合同中有相同项目，承包人要求直接采用相关单价来处理加固费用。

事件2：在桥梁基础开挖安危成后，施工项目负责人组织施工人员、质检人员对槽基几何尺寸和标高这两项隐蔽工程进行了检查和验收，随即进入下一道工序。

事件3：施工单位准备开始墩身施工时，由于供应商的失误，将一批不合格的钢筋运到现场，致使墩身施工推迟了10天开始，承包商拟就此向业主提出工期和费用索赔。

问题：

1、事件1中，承包人的要求是否合理？说明理由。

2、针对事件3，承包商是否可以提出工期和费用索赔？说明理由。

蒸馏酒中铅的污染主要来源于（）

A.蒸馏过程中所用容器、管道

B.原料中的果胶、木质素

C.使用木薯为原料

D.原料中的糠麸、谷壳

E.加入的食品添加剂

在整流电路中，二极管之所以能整流，是因为它具有（）。

A.电流放大特性

B.单向导电的特性

C.反向击穿的性能

D.稳压特性

WWW is popular for its multimedia transmission and friendly (71) . Although the speed of network has been improved considerably in recent years, the rapid (72) of using the Internet, the inherited character of delay in the network and the Request/Response working mode of WWW still make the Internet traffic very (73) and give no guarantee on the Quality of Service. Because HTTP has no states, the web server cannot know the users’ demand and the users’ requests cannot be predicted Taking advantage of a cache mechanism and the time locality of WWW accesses, the browser can preserve the documents ever accessed in the local machine. By this means, for the documents in the local cache, the browser does not need to send the requests to the remote server or to receive the whole responses from the remote one Pre-fetching uses the space locality of accesses First, the users’ access requests are predicted according to the users’ current request. Secondly, the expected pages are fetched into the local cache when the user is brow sing the current page. Finally, the users can access these pages downloaded from the local cache. And this can reduce the access delay to some degrees. Pre-fetching is one kind of active caches that can cache the pages which are still not requested by the user. The application of pre-fetching technology in the web can greatly reduce the waiting time after users have sent their requests. This paper brings forward an intelligent technique of web pre-fetching, which can speed up fetching web pages. In this technique, we use a simplified WWW data model to represent the data in the cache of web browser to mine the association rules. We store these rules in a knowledge base so as to (74) the user’s actions. In the client sides, the agents are responsible for mining the users’ interest and pre-fetching the web pages, which are based on the interest association repository. Therefore it is (75) for the users to speed up the browsing.

（72）处填（）。

A．reduction

B．expansion

C．reduce

D．expansible