装备涡桨収动机的飞行在颠簸气流中飞行时,通常把点火电门接通在连续点火位,这样做的目的主要是?()
A.防止涡轮超温
B.防止燃烧室熄灭
C.防止压气机进入喘振状态
参考答案:B
When he was there, he _________ go to the coffee shop after work every day.
A.was used to
B.should
C.would
D.had better
开关油用于()
A、绝缘
B、灭弧
C、绝缘和灭弧
D、冷却