周围神经系统由12对颅神经和多少对脊神经构成

人的神经系统是由周围神经系统和（）两部分构成的；其中周围神经系统又分为脊神经、脑神经和（）三部分。

神经系统由中枢神经系统和周围神经系统两部分组成。中枢神经系统包括脑和脊髓。脊髓是中枢神经系统的高级部位。脑是中枢神经系统的低级部位。

一台完整的计算机是由硬件系统和软件系统两大部分组成的

一个完整的计算机系统通常是由硬件系统和软件系统两大部分组成的。

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。