普通混凝土用砂含泥量增大时,混凝土的干缩___ ,抗冻性___ .

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（）.

Effects which are dutiable or subject to prohibitions or restrictions should be declared in （）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

砌体工程拌制砂浆用砂含泥量不宜（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

普通混凝土用砂的标准中有关砂的质量要求： 当混凝土强度等级大于或等于C30时： a．砂中含泥量限量（按重量计﹪）（）； b．砂中泥块含量（按重量计﹪）（）；