Friday, September 16, 2022
Monday, March 4, 2024
问题:水产增殖业的资源理论是什么?怎样做到池塘的“地尽其力”?...
Tuesday, June 27, 2023
Thursday, April 25, 2024
Monday, September 12, 2022
Tuesday, February 13, 2024
Thursday, April 25, 2024
Friday, September 16, 2022
问题:虾蟹类的感觉器官主要有化学感受器、触觉器、眼等。...
Tuesday, November 15, 2022
问题:虾蟹类的内分泌系统由神经内分泌系统和非神经内分泌系统组成。...
Tuesday, February 13, 2024
Thursday, April 20, 2023
问题:虾蟹类的内分泌系统:神经内分泌系统;非神经内分泌系统;前者包括:...
Sunday, September 11, 2022
Saturday, August 12, 2023
问题:下列河蟹的疾病主要是由寄生虫引起的是()A、蜕壳不遂B、纤毛虫病C、肝坏死病D、甲壳溃疡...
Sunday, February 4, 2024
Monday, August 14, 2023
问题:新建育苗池酸性强,需浸泡1月以上(加工业碱液)。...
Tuesday, October 10, 2023
Sunday, September 11, 2022
问题:蟹类的螯状步足主要功能为取食、挖掘洞穴、防御、进攻。...
Tuesday, October 10, 2023
Friday, September 16, 2022
Friday, September 16, 2022