根据《客运专线铁路无碴轨道铺设条件评估技术指南》的要求，沉降变形观测网按（）等变形测量等级技术要求建立，沉降变形观测点的水准测量采用（）等变形观测测量技术要求。

翻译：With Average or With Particular Average（WA or WPA）（）

观测值L和真值X的差称为观测值的（）

在测量中，观测的精度就是指观测值的数学期望与其真值接近的程度。（）

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（）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。