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问题描述：

[单选] 下列β-内酰胺类抗生素药物半衰期最长的是（）
A．青霉素 B．头孢唑林 C．头孢呋辛 D．头孢曲松
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5，你正在审核一个涉及大量采购活动的项目，令人吃惊的是，项目团队没有预先定义该采购活动的供方选择标准。项目中采购活动的供方选择标准在以下哪个过程中制定的？You are auditing a project that involves significant procurement activities． To your surprise， you find out that the project team does not have any predefined source selection criteria to be used for any of the procurements． The source selection criteria for all procurements in a project is developed during which of the following processes？（）
4，卖方组织正在根据合同执行项目的工作。在项目进行过程中，就工作范围和质量产生了一些争议。以下哪一项是解决这些争议的首选方法？A seller organization was executing work for a project under a contract． During the course of the project， a number of disputes arose over the scope and quality of the work． Which of the following is the preferred method of resolving these claims？（）
2，迪娜是一个硬件项目的项目经理，正在对采购过程进行结构化的审查。她想检查从计划采购管理过程到控制采购过程的每一份文件，以确定失败之处。迪娜应该用什么工具？Dina， the project manager of a hardware project， is performing a structured review of the procurement process． She would like to examine each document from the Plan Procurement Management process through the Control Procurements process to identify failures． What tool should Dina use？（）
1，买方和卖方为初级工程师、高级工程师、建筑师和其他预定义的角色设置费率。这适用于哪种类型的合同？A buyer and seller set the rates for junior engineers， senior engineers， architects， and other predefined roles． In what type of contract would this be applicable？（）
（1）几处早莺争暖树，谁家新燕啄春泥
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