国际遗传育种学界最流行的一句话是：“谁掌握种质，谁就掌握未来”！

国际遗传育种学界最流行的一句话是：“谁掌握种质，谁就掌握未来”!

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。

比较选择育种中两种基本的选择方法单株选择法与混合选择法优缺点。

选择育种最常见的两种选择法是单株选择法和（）。

同一种动物遗传结构不同个体之间的移植称为（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。