问题:现代渔业的良种繁育研究中,主要的育种技术有哪些?...
Thursday, September 15, 2022
Thursday, September 15, 2022
Thursday, September 15, 2022
Sunday, November 5, 2023
Monday, September 12, 2022
问题:作物的呼吸作用根据是否需要O<sub>2</sub>分为:()...
Thursday, September 15, 2022
Friday, December 15, 2023
Sunday, May 28, 2023
Sunday, December 31, 2023
问题:植物的大生长周期是指植物的整个生长过程可以表示为()生长曲线...
Thursday, September 15, 2022
问题:某一种混合肥料包装袋上有效成分13-46-0,则描述该商品肥料中...
Thursday, September 15, 2022
问题:种子包衣都不能提供作物苗期生长的养分,不能促进种子发芽出苗。...
Monday, February 5, 2024
问题:成熟的胚囊中有个核个细胞()。A、7,8B、8,7C、7,7D、8,8...
Sunday, September 25, 2022
Thursday, September 15, 2022
Thursday, September 15, 2022
Thursday, September 15, 2022
问题:GDP是一个国家(地区)在一定时期内所生产的全部最终产品和服务的...
Monday, September 12, 2022
Thursday, September 15, 2022
问题:目前我国种植的作物及其品种,从外国引进约占()A、大部分B、一半左右C、少部分D、没有...
Sunday, October 23, 2022
Thursday, September 15, 2022