下列哪种细胞不是由巨噬细胞演变而来？（）

下列哪种细胞不是由巨噬细胞演变而来（）

Th细胞活化所需的IL-2是由下列哪种细胞分泌的（）

Th细胞活化所需的IL-2是由下列哪种细胞分泌的

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

分泌抗体的浆细胞由下列哪种细胞分化而来

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。