举例说明在微生物诱变育种工作中，采用高效筛选方案和方法的重要性。

作物诱变育种中，主要处理植物的（）

辐射诱变方法是指对植物材料的辐射处理方法，根据辐射源所处的位置一般可分为（）和（）两种。

简要说明诱变育种的步骤，应注意哪些问题？

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

比较辐射诱变和化学诱变育种的异同。

化学诱变剂有哪几种类型，如何引起基因突变的，可引起哪类基因突变？

诱变育种宜选用作基础材料的有（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。