Thursday, September 22, 2022
Wednesday, January 24, 2024
猪一段()月龄达到性成熟,()月龄就可以初次配种。母猪的平均发情周期()天,发情持续期约()天。...
Thursday, September 22, 2022
单选题含()过高的饲料极易在高温、高湿的储存条件下发生“酸败”。A 脂肪B 蛋白质C 维生素D 矿物质...
Thursday, May 11, 2023
Saturday, November 19, 2022
多选题下列肌肉中属于肘关节的屈肌是()。A斜方肌B冈上肌C臂肌D臂头肌E臂二头肌...
Sunday, May 28, 2023
Sunday, July 23, 2023
当猪体缺乏微量元素()时可引发不完全角化症,表现为生长受阻、被毛、皮肤损害明显等。...
Friday, September 16, 2022
单选题心脏位于()。A 腹腔B 胸膜腔C 腹膜腔D 胸纵隔...
Wednesday, November 29, 2023
畜体前肢的静脉血流回心脏的过程中需要经过的血管有()。...
Thursday, September 22, 2022
Saturday, March 9, 2024
单选题牛羊终生都不具有的齿是()。A 下切齿B 犬齿C 前臼齿D 后臼齿...
Wednesday, May 3, 2023
Tuesday, January 2, 2024
Wednesday, September 14, 2022
Thursday, September 22, 2022
Friday, September 16, 2022
Tuesday, September 20, 2022
Wednesday, September 21, 2022
杜洛克猪生长速度快、饲料报酬高、胴体品质好,但繁殖力偏低,适合做()...
Thursday, September 22, 2022
Wednesday, September 14, 2022