相关系数为+1时，说明两变量安全相关，相关系数为-1时，说明两个变量不相关

变量和变量的Pearson相关系数R=1，这说明变量和变量间的相关关系是(　　)。

变量X和变量Y，的Pears0n相关系数T=1，这说明变量X和变量Y间的相关关系是（  ）。

若两变量间的相关系数为0，则说明这两个变量不存在相关关系。

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。