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问题 选择题

直臂用力提重水桶保持不动，上臂肌肉所处的状态是：[ ]

A．肱二头肌收缩，肱三头肌舒张

B．肱三头肌收缩，肱二头肌舒张

C．两种肌肉同时收缩

D．两种肌肉同时舒张

答案

答案：C

多项选择题 案例分析题

男，25岁，头昏乏力、鼻粘膜出血7天来就诊；检验：Hb83g/L，WBC40×109/L，外周血涂片分类见幼稚细胞。骨髓片增生极度活跃，原始细胞50%，幼粒细胞20%，PLT19×109/L，原始细胞POX阳性反应，NAP（-），NSE部分呈阳性反应，不被NaF抑制，确诊为急性非淋巴细胞白血病。

临床上将尼曼－匹克病分哪几型？（）

A.脑病型

B.黄疸型

C.慢性神经型

D.慢性非神经型

E.急性神经型
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单项选择题

Critical chain is a schedule network analysis technique that modifies the project schedule to account for limited resources. Critical chain combines deterministic and probabilistic approaches. Initially, the project schedule network diagram is build using non-conservative estimates for activity durations within the schedule model, with required dependencies and defined constraints as inputs. The critical path is then calculated. After the critical path is identified, resource availability is entered and the resource-limited schedule result is determined. The resulting schedule often has an altered critical path. The critical chain method adds non-work schedule activities to maintain focus on the planned activity durations, also referred to as ______ .

A．duration buffers

B．resource leveling

C．reverse resource leveling

D．crashing
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