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【简答题】
简述润滑系统的功用和润滑方式。
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反馈参考答案：
举一反三
【单选题】Tony couldn't go to university but______ his education through evening school courses.
A.
has continued
B.
continued
C.
continues
D.
had continued
【单选题】飞机主操纵系统在飞行中的功用是?
A.
用来操纵副翼、方向舵、升降舵运动
B.
用来操纵飞机绕纵轴、立轴、横轴转动，以改变或保持飞机的飞行姿态
C.
操纵飞机绕纵轴、立轴、横轴运动
D.
操纵飞机起飞、着陆，上升、下降
【单选题】You won't be able to finish the job _______ you stop playing around.
A.
unless
B.
lest
C.
in case of
D.
so that
【单选题】For our middle school students, some courses are compulsory, while others are ______. [ ]
A.
flexible
B.
optional
C.
impressive
D.
significant
【单选题】Various optional courses being available, we can choose ________ based on our own interest.
A.
either
B.
each
C.
one
D.
it
【简答题】阅读理解。 Courses Meeting your needs We understand that our students are of different age-groups and abilities, come from different backgrounds and have different personal and professional reasons for wis...
【单选题】自动驾驶仪的主要功用是（）。
A.
在长时间的飞行中，减轻驾驶员操纵航空器的疲劳
B.
使驾驶员按更正确的航向飞行
C.
为持久水上飞行提供必要的航空设备
D.
提供航空器导航的辅助系统
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