测定居住区大气中甲醛时，大气中共存的二氧化氮和二氧化硫对测定无干扰；乙醛、丙醛、丙烯醛、正丁醇、异丁醇和乙酸乙酯对测定有影响。

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。

鉴别乙醇和丁醇可以用下列哪个试剂（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

用硅钼兰比色法测定微量硅时，加入正丁醇的作用是（）。

用硅钼兰比色法测定微量硅时，加入的正丁醇是一种( )。

用硅钼兰比色法测定微量硅时，加入的正丁醇是一种（）。