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【判断题】
折返线、安全线不归车站管理。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】The angle at which 90 ° refraction of a longitudinal sound wave is reached is called
A.
The angle of incidence
B.
First critical angle
C.
The angle of maximum reflection
D.
The second critical angle
【单选题】A curve is a line_________no part is straight and which has no angle.
A.
that
B.
whose
C.
of which
D.
which
【简答题】Which one of each of the following pairs is expected to have the larger bond angle?
【单选题】the is the angle at which the airfoil begins to loses its lift.
A.
angle of attack
B.
blade angle
C.
pitch angle
D.
critical angle of attack
【单选题】The maximum angle at which the intact stability curves are valid for ship’s is the angle for（）.
A.
the limit of positive stability
B.
the limit of small-angle stability
C.
maximum offset
D.
downflooding
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