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B
