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（）.

Effects which are dutiable or subject to prohibitions or restrictions should be declared in （）.

发生在线粒体内的生物化学反应有（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

反萃取（Back extraction）

●设AND、OR和NOT分别表示按位与、按位或和按位求反运算，且X=10011011，Y=01111010，Z=11101000，则(NOT(X) AND Y)= (9) ， (Y OR NOT(Z))= (10) 。10011011011110101110100001100000(10)

生物反硝化作用的影响因素是什么

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

关于反萃取的概念，下列说法正确的是（）