下列（）为通风天窗。（1）矩形天窗（2）井式天窗（3）平天窗（4）三角形天窗

锯齿形天窗采光效率比纵向矩形天窗高。

矩形天窗、平天窗、锯齿形天窗三者，以锯齿形天窗的采光效率最高。

上悬式钢天窗扇的开启角度不能大于（）。

中悬式钢天窗扇的开启角度可达（）。

利用天窗排风的工业建筑可不设避风天窗的情况是（）

OR指令的作用是: 。( )

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.

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。