一般每生产1t铸件需用（）型砂。

（）是指普调考、技能竞赛、新员工结业考试或技能竞赛等规模较大的考试考核活动。

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。

加油站经理认证考核（试）包括理论知识考试和实操技能考核。其中理论知识考试（）分以上为合格，实操技能考核（）。

对户内燃气管道除锈只能用人工除锈不能用机械除锈。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

表面干型兼有湿型和干型的若干优点，因而比之湿型和干型应用广泛。