蒸汽采暖系统的缺点是（）

对比热水采暖，简述蒸汽采暖有何优缺点？

什么是分件吊装法及综合吊装法？简述其优缺点及适用范围。

反映保护煤柱的具体留法及尺寸大小的相关图纸都是（）。

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。

高压蒸汽采暖系统与低压蒸汽采暖系统划分的蒸汽（绝对）压力是（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。