Including a contingency reserve in the project budget is intended to ______ .

A) reduce the probability of scope changes
B) increase the probability of scope changes
C) reduce the probability of a cost overrun
D) increase the probability of a cost overrun

下列有关流行性出血热病毒的描述错误的是

A．属布尼亚病毒科汉坦病毒属
B．为DNA病毒
C．核蛋白抗体出现最早，有利于早期诊断
D．膜蛋白能诱导宿主产生具有保护作用的中和抗体
E．不耐热，不耐酸，对紫外线、酒精、碘酒等消毒剂敏感