项目变更的三大起因是:就如何达到项目目标进行初次评估时出了错有了关于可交付成果的新信息新的要求()
A. 更换项目经理或其他关键项目团队成员;高层管理更改了优先排序;合同上的困难
B. 时间、资源或成本的相对重要性产生了变化;对可交付成果有了新的了解、技术上的不确定性
C. 就如何达到项目目标进行初次评估时出了错有了关于可交付成果的新信息新的要求
D. 职能经理做出的资源承诺不能兑现、成本超支、客户要求变更
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Many of the activities performed during the preliminary investigation are still being conducted in(1),but in much greater depth than before. During this phase, the analyst must become fully aware of the (2) and must develop enough knowledge about the (3)and the existing systems to enable an effective solution to be proposed and implemented. Besides the(4)for process and data of current system, the deliverable from this phase also includes the(5)for the proposed system.空白(2)处填()
A. main symptom
B. rootproblem
C. finalblueprint
D. dataspecification
张某,女,19岁。因急起高热,显著头痛、肌痛、关节痛、乏力、咽干、食欲减退2天,伴鼻塞、流涕。眼结膜及咽部充血,肺部可闻及干啰音,拟诊"流行性感冒"。该病传染期一般持续()
A. 3天
B. 4天
C. 1周
D. 2周
E. 3周
345型链锯的电刷的作用()。
A. 清除磁铁的灰尘
B. 导风散热
C. 支撑起动器
D. 排线作用
下列哪一项是食管静脉曲张的X线特征性表现()
A. 食管黏膜皱襞增宽、迂曲呈串珠样充盈缺损
B. 食管张力减低,管腔扩张
C. 蠕动减弱
D. 黏膜皱襞破坏、中断
E. 最初局限于食管下段