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【单选题】
下列哪项数值最接近男性红绿色盲的发病率:
A.
0.005
B.
0.008
C.
0.01
D.
0.03
E.
0.05
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【单选题】Which system(s) in the hydraulic systems of crane always hold(s) single side of load?
A.
hoisting system only
B.
hoisting system and luffing system
C.
hoisting system and slew and slewing system
D.
slewing system only
【判断题】Paint事件的参数中可以有Graphics对象
A.
正确
B.
错误
【单选题】不属于盘花的固定法的是( )。
A.
加粗固定法
B.
斜切固定法
C.
十字或米字纵切固定法
D.
折曲固定法
【单选题】For a balanced three-phase △ -connected load, the average power absorbed by the load is P . Change the △ -connected load to Y-connected load, the power will :
A.
remain the same
B.
increase to P
C.
increase to P
D.
increase to 3 P
【单选题】The slender column is under axial compressive load P, the critical load 【图片】is independent of ( ).
A.
the material of the column
B.
the length of the column
C.
the magnitude of the P
D.
the shape and dimension of the cross section of the column
【单选题】The vessel’s load line certificate is always issued by ____.
A.
The register of shipping
B.
custom house
C.
cargo survey bureau
D.
maritime safety administration
【单选题】One should always be careful with _ (load) guns.
A.
loading
B.
loaded
【单选题】The vessel’s load line certificate is always issued by ____.
A.
the register of shipping
B.
custom house
C.
cargo survey bureau
D.
maritime safety administration
【单选题】The load on the crosshead pin is always ______, so it is the ______ half of the bearing which is subject to wear.
A.
upwards / top
B.
upwards / bottom
C.
downwards / top
D.
downwards / bottom
【单选题】The vessel’s Load Line Certificate is always issued by ().
A.
The Register of Shipping
B.
Customs House
C.
Cargo Survey Bureau
D.
Maritime Safety Administration
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