大脑皮层抑制机能的发展是大脑机能发展的重要标志之一。

大脑皮层抑制机能发展的前提之一是神经纤维髓鞘化。到（）岁末，儿童基本完成所有皮层传导通路的髓鞘化。

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.

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 （）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

睡眠是消除疲劳，保持身体健康的生理功能之一，是一种重要的生理现象，是大脑和各器官的一种最基本的（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。