油桐均为雌雄异株单性花，故栽培时需要配置授粉树。

银杏中提取物（天保宁，依康宁等）为银杏科植物银杏的干燥叶提取物。其药理作用有（）

银杏雌雄同株。

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.

异花授粉园艺植物中最典型的种类如菠菜，苏铁、银杏等属于（）植物。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

银杏纲在裸子植物中属较原始类型，证据之一是银杏精子具纤毛。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。