大体积混凝土采用斜面分层方案浇筑时，混凝土一次浇筑到顶，混凝土振捣工作从浇筑层（ ）。

大体积混凝土浇筑后，应在（）内采取保湿、控温措施。养护期内，混凝土内部与表面温差不应超过250℃；

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。

混凝土入仓铺料采用斜层浇筑法时，浇筑块高度一般限制在（）左右。

大跨径连续梁桥的承载结构混凝土浇筑常采用的施工方法是（ ）。

阐述混凝土的搅拌、浇筑与养护的施工要点。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。