Saturday, October 1, 2022
Sunday, April 21, 2024
Wednesday, July 26, 2023
Sunday, September 11, 2022
Sunday, September 11, 2022
问题:灌溉水的允许含盐量一般应小于()A、1g/LB、2g/LC、3g/LD、4g/L
Tuesday, November 8, 2022
Monday, October 2, 2023
Wednesday, July 26, 2023
Saturday, September 10, 2022
Sunday, April 21, 2024
Sunday, September 11, 2022
Thursday, September 28, 2023
问题:沟、畦灌溉的平整土地范围一般以条田内部()为一个平整单元。A、一条毛渠所控制的灌溉面积B、一条农渠所控制的灌溉面积C、一条毛沟所控制的排水面积D、一条农沟所控制的排水面积
Saturday, September 10, 2022
Sunday, September 11, 2022
Tuesday, April 4, 2023
Saturday, September 10, 2022
Monday, October 2, 2023
Saturday, September 10, 2022
问题:20%原则是指控制支管上任意两个喷头的工作压力水头之差不超过喷头设计工作压力水头的20%。
Saturday, April 1, 2023
Saturday, January 21, 2023