不规范的坐姿是（）

A．头正，颈直

B．捋平护士服下端

C．双膝分开脚后收

D．双手自然放于腿上

E．轻稳地坐于椅面的前2/3

MOVING OF AN ANCHOR OVER THE SEA BOTTOM INVOLUNTARILY BECAUSE IT IS NO LONGER PREVENTING THE MOVEMENT OF THE VESSEL defines（）.

A.Dredging (of anchor)

B.Dragging (of anchor)

C.Weighing anchor

D.Walking out anchor