【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】配制 SnCl 2 水溶液的正确方法应该是
A.
先把 SnCl 2 固体加入水中,再加热溶解
B.
先在水中加入足量 HNO 3 ,再加入 SnCl 2 固体溶解
C.
先把 SnCl 2 固体 溶解到较 浓 的 HCl 中,再加水稀释至 所需 浓度
D.
先把 SnCl 2 加入水中,再加 HCl 溶解
【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 er 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 ( )
【简答题】钢砼板中的受力钢筋作用是( )、分布钢筋作用是把板面荷载均匀地传递给( ),且防止在垂直于板跨度方向产生( )。
【多选题】在异方差条件下普通最小二乘法具有如下性质