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【多选题】
特种作业人员具备的条件( )A.
年龄满18周岁
B.
身体健康、无妨碍从事相应工种作业的疾病和生理缺陷
C.
初中以上文化程度,具备相应工种的安全技术知识
D.
符合相应工种作业特点需要的其他条件
E.
参加企业组织的安全技术理论和实际操作考核并成绩合格
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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 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】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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