问题:下列哪些器官可称为可逆库()A、块根和块茎B、叶鞘和茎杆C、种子D、果实
Friday, September 16, 2022
问题:试述植物通过哪些适应性机制来应答对环境养分缺乏的胁迫?
Friday, September 16, 2022
Thursday, September 15, 2022
Friday, September 16, 2022
问题:某土壤容重为1.45g/cm3,今测得其湿土质量为15g,烘干后,称重为13g,则这种土壤的总孔隙度为()A、45B、50C、55D、60
Thursday, September 15, 2022
Friday, September 16, 2022
Monday, March 18, 2024
Friday, September 16, 2022
Friday, September 16, 2022
Thursday, January 11, 2024
Friday, September 16, 2022
Friday, September 16, 2022
Friday, September 16, 2022
Saturday, February 11, 2023
Saturday, June 24, 2023
Thursday, September 15, 2022
Thursday, September 15, 2022
问题:下列()为基层分类的基本单元A、土纲B、亚纲C、土类D、亚类E、土属
Thursday, September 15, 2022
Thursday, September 15, 2022
Monday, September 12, 2022