试述狱内杀人案件的侦查途径和取证措施。

狱内侦查人员应具备的素质包括（）

第一次全国狱内侦查工作会议召开的年份是（）

第二次全国狱内侦查工作会议召开的年份是（）

狱内侦查工作是对狱内的在押犯的下列案件展开侦查（）

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

压裂时，水井压裂一般使用粒径为（）mm的压裂砂。

明确授权监狱行使狱内侦查权的法律是（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。