Heart disease takes up about ______ of the in-flight medical emergencies on US f

游客2023-09-16  25

问题 Heart disease takes up about ______ of the in-flight medical emergencies on US flights. [br] According to the passage, the expansion of air in body cavities can result in ______.

选项 A、heart attack
B、chest pain
C、stomach cramping
D、difficult breathing

答案 C

解析 第2段第4句提到了“体腔内空气膨胀”,接下来三句分别列出了这种现象可能导致的三种病症,其中选项C在第5句提到,为本题答案。选项A引起的原因没有提到;根据第2段第3句,选项B应由血液中含氧量低导致的;选项D在第3段提及,由血栓引起。
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