题目内容

从生产绿色食品角度,甜瓜坐瓜最安全的技术措施是()授粉。

查看答案
更多问题

4321整枝法是,主蔓留( )片真叶摘心,保留上部3片真叶叶腋处长出的( )条子蔓,每条子蔓留( )片叶摘心。子蔓出3条孙蔓,孙蔓留( )片叶摘心。孙蔓出2条重孙蔓,重孙蔓留( )片叶摘心。

三子蔓整枝法是,主蔓留( )片真叶摘心,保留上部( )片真叶叶腋处长出的( )条子蔓,每条子蔓留( )片叶摘心。子蔓上的孙蔓全部打掉。

It is estimated that the US economy will keep growing__________ asteadypacethisyear.

It is high time that we took effective measures to gainincreasing control __________ our own environment.

答案查题题库