采用回弹法检测单个构件混凝土强度时，测区数不能少于10个。

采用回弹法检测对单个砼构件检测时，至少应检测（）个测区，每个测区内检测不少于（）个点，计算时应去掉3个最大值和3个最小值。

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。

采用砂浆回弹法检测砂浆强度时，每一测区的测点数不应少于（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。