Saturday, September 10, 2022
Saturday, September 10, 2022
Friday, December 8, 2023
Saturday, March 23, 2024
问题:以下集水材料的集水效率从高到低排序正确的是()。A、混凝土塑膜覆砂三七灰土夯实;B、机瓦水泥瓦黄土夯实;C、黄土夯实混凝土机瓦;D、水泥瓦三七灰土夯实塑膜覆土。...
Wednesday, December 27, 2023
Sunday, September 11, 2022
Sunday, September 11, 2022
问题:含沙量一定的水,放淤改良盐碱土时,落淤厚度越大,所需放淤定额越(...
Saturday, September 10, 2022
问题:按照根系分布土层中的毛管水与地下水的关系,可将毛管水分为()和(...
Saturday, September 10, 2022
Thursday, September 28, 2023
Sunday, September 11, 2022
Sunday, September 11, 2022
问题:土壤含水量减小时,以下哪些项有所提高()。A、蛋白质含量;B、脂肪含量;C、纤维质量;D、碳水化合物。...
Wednesday, December 27, 2023
Saturday, October 22, 2022
Saturday, September 10, 2022
Tuesday, May 23, 2023
问题:灌区的灌水率是指灌区()过程线。A、单位面积用水量B、单位面积灌水定额C、单位面积上的净灌水流量D、净灌水流量...
Saturday, October 1, 2022
问题:灌水率图的修正时,改变灌水定额,灌水定额的调整值不应超过原定额的()A、5%B、10%C、15%D、20%...
Tuesday, November 28, 2023
Sunday, September 11, 2022
问题:一个灌溉工程的灌溉用水量在多年期间能够得到保证的概率称为()...
Saturday, September 10, 2022