Thursday, September 22, 2022
单选题精子的运动形式有直线前进运动、原地摆动和转圈运动等形式,其中活力最强、属正常运动的是()。A 原地摆动B 转圈运动C 直线前进运动D 来回移动...
Wednesday, September 21, 2022
Wednesday, September 21, 2022
Saturday, April 13, 2024
多选题饲料中的脂溶性维生素包括()。A维生素AB维生素DC维生素ED维生素K...
Sunday, May 5, 2024
Thursday, September 22, 2022
Friday, September 16, 2022
单选题乳牛生产性能的评定主要包括产乳量和()。A 日增重B 胎次C 乳脂率D 泌乳期...
Wednesday, December 7, 2022
Wednesday, September 21, 2022
Wednesday, October 25, 2023
单选题家兔的繁殖力较强,一般妊娠期仅有()天。A 17—18B 31C 42D 114...
Saturday, April 13, 2024
Wednesday, September 21, 2022
多选题以下器官中,属于循环系统的有()。A心脏B淋巴结C肝脏D脾脏...
Friday, November 17, 2023
Thursday, September 22, 2022
Wednesday, September 21, 2022
单选题进口鱼粉中的蛋白质含量一般应为()左右。A 55%—60%B 80%以上C 35%—40%D 15%以下...
Tuesday, April 30, 2024
Thursday, September 22, 2022
Monday, April 1, 2024
Wednesday, September 21, 2022
单选题禽类有一个肌层很发达的肌胃,其主要作用是()。A 磨碎食物B 软化食物C 分泌胃液D 吸收营养...
Friday, November 17, 2023