在钢筋混凝土构件代号中，“JL”是表示（）

在钢筋混凝土构件代号中，不是用"KL"表示（）。

在钢筋混凝土构件代号中，“DB”是表示（）。

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.

When loading or discharging dry mud or cement，crew members should use goggles and（）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

建筑工程识图119.在制作钢筋混凝土构件时通过张拉钢筋对混凝土预加一定的压力,以提高构件的抗拉和抗裂性能的构件叫( )。