【单选题】【单选】The mean draft of a ship is draft ______.
A.
midway between the forward and aft draft marks
B.
at the center of flotation
D.
at the center of buoyancy
【单选题】For a floating vessel,true mean draft is always the().
A.
average of the observed drafts
B.
draft at the center of flotation
C.
draft corresponding to the calculated displacement
D.
mean of the calculated drafts
【单选题】维生素 D缺乏性手足搐搦症最常见的症状是
【单选题】关于心脏和大血管的摄片检查错误的是下列哪一项()
D.
可以初步观察心脏形态,估计各房室大小和肺循环异常的类型
【单选题】The mean draft of a ship is the draft _______
A.
Midway between the forward and aft draft marks
B.
At the center of flotation
D.
At the center of buoyancy
【单选题】The mean draft of a ship is the draft _____.
A.
midway between the forward and aft draft marks
B.
at the center of flotation
D.
at the center of buoyancy
【单选题】关于Python内存管理,下列说法错误的是哪项()?