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【单选题】
机械通气时吸氧浓度一般设置为A.
21%
B.
21%~30%
C.
30%~40%
D.
40%~50%
E.
>60%
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皮皮学刷刷变学霸
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【单选题】The downflooding angle for a ship is the minimum angle at which ().
A.
The load line becomes submerged
B.
A non-watertight opening is at still water level
C.
Offset becomes excessive
D.
Reserve buoyancy is a maximum
【单选题】The prime vertical is the reference point from which the angle of which type of observation is measured ().
A.
Sextant angle
B.
Azimuth
C.
Amplitude
D.
Local apparent noon
【单选题】The angle at which the anchor flukes penetrate the soil is the（）.
A.
burial angle
B.
penetration angle
C.
fluke angle
D.
holding 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
【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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