Monday, September 12, 2022
Monday, May 19, 2025
问题:有一个鱼苗暂养池发生了严重的鳃隐鞭虫病,现需用0.7ppm的硫酸...
Sunday, September 11, 2022
Monday, January 20, 2025
Thursday, June 19, 2025
Monday, October 31, 2022
Friday, January 31, 2025
Monday, September 12, 2022
Monday, September 12, 2022
问题:发病鱼体两侧出现圆形或椭圆形的红斑,以后逐渐扩大,形似在鱼体上盖了红色印章,这是赤皮病的主要症状。...
Wednesday, July 24, 2024
Saturday, May 13, 2023
Friday, September 16, 2022
Monday, January 20, 2025
Friday, September 16, 2022
Friday, March 14, 2025
Friday, September 16, 2022
问题:急性型疾病机能调节从生理转入病理性天数()。A、1-5周B、2-6周C、3-7周D、4-8周...
Wednesday, July 24, 2024
Friday, June 21, 2024
Thursday, February 1, 2024
Friday, September 16, 2022