计量学包括测量（）和（）的所有方面.
A. 理论
B. 真实值
C. 误差值
D. 实践
下列有关传染病的说法不正确的是（）。
A. 传染病是指能够在人群中引起流行的感染性疾病
B. 不存在人与动物之间的相互传染
C. 有地方性、季节性
D. 疾病发展具有潜伏期
Which three of these statements about penultimate hop popping are true？（）
A. It is used only for directly connected subnets or aggregate routes.
B. It can only be used with LD
C. It is only used when two or more labels are stacked.
D. It enables the Edge LSR to request a label pop operation from its upstream neighbors.
E. It is requested through TDP using a special label value that is also called the implicit-null value.
F. It is requested through LDP using a special label value that is also called the implicit-null value.
患者女，46岁，因“突发左上腹疼痛伴头晕、冷汗6h”来诊。无恶心、呕吐。3d前行妇科腹腔镜手术后卧床休息。查体：T38.5℃，P120次/min，R28次/min，BP110/70mmHg；左下肺呼吸音消失；腹软，左上腹轻压痛；左下肢轻度水肿。ECG：出现SⅠQⅢTⅢ征。诊断考虑的疾病最可能为（）
A. 急性胰腺炎
B. 急性心肌梗死
C. 急性胃炎
D. 急性肺血栓栓塞症
E. 左侧胸膜炎
F. 胃穿孔
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