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单选题
1849. 无液压可用时,可手动放下前起落架,起落架在气流和自身重力的作用下到达放下位
A
When hydraulic is not available, the nose landing gear can be extended by maunual and extends by airloads and its own weight;
B
When hydraulic pressure is too low, the nose landing gear can be extended by maunual and extends by airloads and its own weight;
C
The nose landing gear can be extended by maunual and retracts by airloads and its own weight when hydraulic is not available;
答案解析
正确答案：A
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