隧道施工中采取的综合性防尘措施主要有（  ）。

隧道施工中采取的综合性防尘措施主要有(    )。

在隧道施工中采取的防尘措施是综合性的，主要措施有（　）。

在隧道施工中，由于钻眼、爆破、装渣、喷混凝土等原因，洞内空气中漂浮着大量的粉尘，这些粉尘对施工人员的身体健康危害极大，因此必须在隧道施工过程中进行防尘工作。在隧道施工中采取（）、（）、（）和（）相结合的综合性防尘措施。

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。