Why has the captain asked the passengers to keep their seat belts on?
[A] The plane is going to land.
[B] The plane is going to take off.
[C] The air might become very rough.
第9题
A.蓄能器吸收泵的压力脉动和稳定卸载阀的卸载动作
B.蓄能器充入的气体为氮气
C.压力增高时,氮气被压缩(压入一定量的高压乳化液)
D.蓄能器蓄能器充入的气体为空气
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!