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单选题
636.时指示片由绿色变为黄色 When does the indicator from green change to yellow?( )
A
氧气瓶压力过大 Oxygen bottle pressure is overpress.
B
低压管道压力过大 Low pressure pipe pressure is overpress.
C
氧气瓶压力或低压管道压力过大 Oxygen bottle pressure is overpress or low pressure pipe pressure is overpress.
答案解析
正确答案：C
解析：
题目解析
时指示片由绿色变为黄色 When does the indicator from green change to yellow? A. 氧气瓶压力过大 Oxygen bottle pressure is overpress. B. 低压管道压力过大 Low pressure pipe pressure is overpress. C. 氧气瓶压力或低压管道压力过大 Oxygen bottle pressure is overpress or low pressure pipe pressure is overpress. 答案:C
解析：时指示片通常是用来指示氧气系统的状态，特别是氧气瓶的压力和低压管道的压力。当氧气瓶压力或低压管道压力过大时，时指示片通常会从绿色变为黄色，表示有问题。因此，正确答案是C，氧气瓶压力或低压管道压力过大时。
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