The amount of air which is mixed with oxygen is controlled by cabin altitude. The above sentence means "与空气混合的氧气量由座舱高度控制."
A.1
正确答案是B
The amount of air which is mixed with oxygen is controlled by cabin altitude. The above sentence means "与空气混合的氧气量由座舱高度控制."
A.1
正确答案是B