脐部溃疡呈坚硬固定而突出

A．癌性
B．脐尿管未闭
C．结核性炎症
D．化脓性炎症

The maneuvering information required to be posted in the wheelhouse must be based on certain conditions.Which of the following is NOT one of these conditions?（）

A.The hull must be clean

B.There must be calm weather – wind 10 knots or less and a calm sea

C.There must be no currents

D.The depth of the water must be at least one and one-half times the draft