【单选题】When the vessel entering the dock, the first work that engineer should contact with the shipyard ____.
A.
releasing the boiler water
B.
the explosion detecting and cleaning for the fuel tank
C.
the docking project related item
D.
shore power and fire fighting water supply
【单选题】When ship in the dock repairing, engine department should emphasize on the inspection of ____.
A.
sea valve chest, sect valve, thruster
B.
bilge motherboard, steering and the shaft system
【单选题】When a tug is in irons,she ().
A.
Is made fast to the dock with engines secured
C.
May be in danger of being overrun by her tow
D.
Should pay out more towline
【判断题】太阳内部有“里三层”,外部有“外三层”结构。
【单选题】关于RIA与IRMA叙述错误的是 ( )
【单选题】在异方差条件下普通最小二乘法具有如下性质
【多选题】存在异方差条件下普通最小二乘法具有如下性质()
【多选题】在异方差条件下普通最小二乘法具有如下性质()
【简答题】( 3 ) 在异方差性条件下,普通最小二乘法具有如下性质 ( ) 。 A . 线性 B . 无偏性 C . 最小方差性 D . 精确性 E . 有效性A.B.C.D.E. E
【多选题】在异方差条件下普通最小二乘法具有如下性质