20世纪60年代以来，学前教育发展的主要趋势之一是学前教育事业成为()。

翻译：With Average or With Particular Average（WA or WPA）（）

20世纪初，美国实用主义教育家（）提出了儿童中心论的观点，贬低和否定了教师的主导作用。

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（）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

爱伦·凯在《儿童的世纪》中提出，21世纪将成为“儿童的世纪”。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。