桔梗科的药用植物较多，如（）、（）等。

所有高等植物都具有世代交替, 同时都具有异孢现象。( )

蔷薇科植物的主要特征有哪些？列出至少3种蔷薇科的代表植物。

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.

芍药是毛茛科的木本植物。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

蓼科植物的果实常包于宿存的（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。