烧结普通砖的孔洞率小于（）

烧结空心砖是经培烧制成的空洞率（），而且孔洞数量少、尺寸大，用于非承重墙和填充墙体的烧结砖。

按使用特点，道路分为公路、城市道路、厂矿道路、林区道路及乡村道路等。

按行驶道路条件的不同，汽车可分为公路行驶汽车和（）

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。

砌墙砖按规格、孔洞率及孔的大小，分为（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。