软玉按产出环境可分为碳酸盐岩与中酸性岩浆岩的接触变质成因、（）的交代成因和（）成因

可作为细菌鉴别和细菌分型依据的结构是（）

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

软玉的矿床类型按成因可分为（）生矿和（）生矿体。

在宝石学中，光泽强弱可分为（）。

软玉与相似玉石的鉴别？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

软玉籽料表皮的（）和（）可作为籽料的鉴别特征。