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编制项目成本估算的依据主要有：工作分解结构图、资源需求计划、资源价格、 (64) 、历史信息。
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A survey is a study, generally in the form of an interview or a questionnaire, that provides information concerning how people think and act. In the United States, the best-known surveys are the Gallup poll and the Harris poll. As anyone who watches the news during Line campaigns presidential knows, these polls have become an important part of political life in(5) the United States. North Americans are familiar with the many "person on the street interviews on local television news shows. While such interviews can be highly entertaining, they are not necessarily an accurate indication of public opinion. First, they reflect the opinions of only those people who appear at a certain location. Thus, such samples can be biased in favor(10)of commuters, middle-class shoppers, or factory workers, depending On which area the newspeople select. Second, television interviews tend to attract outgoing people who are willing to appear on the air, while they frighten away others who may feel intimidated by a camera. A survey must be based on a precise, representative sampling if it is to genuinely reflect a broad range of the population.(15) In preparing to conduct a survey, sociologists must exercise great care in the wording of questions. An effective survey question must be simple and clear enough for people to understand it. It must also be specific enough so that there are no problems in interpreting the results. Even questions that are less structured must be carefully phrased in order to elicit the type of information desired. Surveys can be indispensable sources of information, but(20)only if the sampling is done properly and the questions are worded accurately. There are two main forms of surveys: the interview and the questionnaire. Each of these forms of survey research has its advantages. An interviewer can obtain a high response rate because people find it more difficult to turn down a personal request for an interview than to throw away a written questionnaire. In addition, an interviewer can go beyond written(25)questions and probe for a subject’’s underlying feelings and reasons. However, questionnaires have the advantage of being cheaper and more consistent. According to the passage, one advantage of live interviews over questionnaires is that live interviews
为了减小雷电损失，机房工程可以采取的措施有 (17) 。
某施工企业通过投标获得了某住宅楼的施工任务，地上18层、地下3层，钢筋混凝土剪力墙结构；业主与施工单位、监理单位分别签订了施工合同、委托监理合同。施工单位(总包单位)将土方开挖、外墙涂料与防水工程分别分包给专业性公司，并签订了分包合同。 施工合同中说明：建筑面积23420m2，工程工期450天，2003年8月1日开工，2004年 11月25日竣工，工程造价3165万元。 合同约定结算方法：合同价款调整范围为业主认定的工程量增减、设计变更和洽商；外墙涂料、防水工程的材料费，调整依据为本地区工程造价管理部门公布的价格调整文件。 [问题] 合同履行过程中发生以下几种情况，请按要求回答问题。 1．总包单位于7月24日进场，进行开工前的准备工作。原定8月1日开工，因业主办理相关手续而延误至5日才开工，总包单位要求工期顺延4天。此项要求是否成立根据是什么 2．土方公司在基础开挖中遇有地下文物，采取了必要的保护措施。为此，总包单位要求土方公司向业主提出索赔。该索赔要求是否正确为什么 3．在基础回填过程中，总包单位已按规定取土样，试验合格。监理工程师对填土质量表示异议，责成总包单位再次取样复验，结果合格。总包单位要求监理单位支付试验费。总包单位的要求是否正确为什么 4．总包单位对混凝土搅拌设备的加水计量器进行改进研究，在本公司试验室内进行实验，改进成功用于本工程，总包单位要求此项试验费由业主支付。总监理工程师是否应批准为什么 5．结构施工期间，总包单位经总监理工程师同意更换了原项目经理，组织管理一度失调，导致封顶时间延误8天。总包单位以总监理工程师同意为由，要求给予适当工期补偿。总监理工程师是否应批准为什么 6．监理工程师检查厕浴间防水工程，发现有漏水房间，逐一记录并要求防水公司整改。防水公司整改后向监理工程师进行了口头汇报，监理工程师即签证认可。事后发现仍有部分房间漏水，需进行返工。返修的经济损失由谁承担监理工程师的做法有何错误 7．在做屋面防水时，经中间检查发现施工不符合设计要求，防水公司也自认为难以达到合同规定的质量要求，就向监理工程师提出终止合同的书面申请，问监理工程师应如何协调处理 8．在进行结算时，总包单位根据投标书，要求外墙涂料费用按发票价计取，业主认为应按合同条件中约定计取，为此发生争议。监理工程师应支持哪种意见为什么
The need for birth control methods has developed fairly (36) , with the desire among many women to be able to (37) when they want to have a baby. At the same time there is a growing (38) of the problem of a rapidly increasing world population. This problem of a (39) world population is largely the result of (40) medical skills, which have (41) the death rate and at the same time raised the birth rate by increasing live births and the number of babies who (42) early childhood. There is a growing (43) that food production cannot keep pace with these increase, the result of which is that in some countries people are already starving to death. This problem is further complicated by the fact that in places like America and Europe, we obtain by trade and consume far more food and resources like oil than, say, the average India, (44) . World population is rising at rate of two percent a year; this means an addition of 70 million people a year to the present population of more than 3 500 million. (45) . The fastest growing region is Latin America which includes South and Central America and the Caribbean, while Africa and Asia closely follow Latin America. However, (46) .
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