世界上种植面积最大种植量最广泛的粮食作物是： 小麦

在小麦田里，下列生态因素中，哪项是影响小麦生长的非生物因素（）

在小麦高产田里，由于土壤耕作层浅，根系入土浅，一般倒伏发生在()期以后。

在红粒高秆的麦田里，偶然发现一株白粒矮秆优质小麦，欲获得白粒矮秆麦种，最简单常用的育种方法是（）

在小麦高产田里，由于土壤耕作层浅，根系入土浅，一般倒伏发生在（）期以后。 

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。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。