问答题

中国巨大的患者数据没有被利用的原因是什么?()
A、非电子化
B、非结构化
C、无用
D、封闭

答案：非结构化

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多项选择题

What is(are) the difference(s) between plateaus and plains? ()

A．A. The altitude of plateaus is above 500 meters, while that of plains is below 200 meters.
B．B. The edge of plateaus is steep while plains are flat.
C．C. PlateauS fluctuate greatly, while plains fluctuate very little.
D．D. Plateaus are in the high latitude areas, while plains in the low latitude area.

单项选择题

催化型可燃气体探测器对低浓度气体灵敏度高（）
A、正确
B、错误