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。

以下哪些情况会造成提示“Incorrect number or IP address”？（）

以遮荫为目的的树丛多用几种树种，以观赏为目的的树丛，常选用单一树种。

大戟科的主要特征是什么？本科有哪些著名的经济树种和观赏树种？

树种的混交类型有，主要树种与主要树种混交、（）、（）、主要树种与伴生树种混交。

根据物候，花色，观赏功能等分别写出下列各类观赏植物：早春先花后叶的树种；夏天开红花的树种；适合丛植的观花树种；适合配置岩石园的树种；适合制作盆景的树种；适合作绿篱的树种。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。