土粒相对密度为2.7～2.71，则这种土为（）。

若设定的条件表达式为“＜60 Or＞100”，则表示( )。

某土样的重度γ=17.1kN／m³，含水率ω=30%，土粒相对密度d_s=2.7，则土的干密度ρ_d为：（）

土粒重量与同体积4℃时水的重量之比称为土粒相对密度，（或称为土粒比重），通常用比重瓶法测定

砂土的土粒相对密度可用于判定其密度。

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.

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。