问题:家禽中雌性是().A、XYB、XOC、ZWD、XXE、ZZ...
Tuesday, April 11, 2023
Tuesday, September 13, 2022
问题:一个种群与其他各种群杂交,所能获得的平均效果称为()....
Tuesday, September 13, 2022
Monday, February 6, 2023
Saturday, February 11, 2023
Tuesday, September 13, 2022
Wednesday, March 20, 2024
问题:阐明下列符号各代表何种激素,并说明该激素的来源,性质和胜利作用。...
Thursday, December 22, 2022
Tuesday, August 15, 2023
问题:短芽饲料富含胡萝卜素,长芽饲料富含维生素E。()...
Saturday, January 14, 2023
Thursday, January 19, 2023
Monday, January 15, 2024
Sunday, March 24, 2024
问题:母马配种的适宜时期应在卵泡发育的().A、出现期B、发育期C、成熟期D、排卵期E、都不是...
Tuesday, November 22, 2022
Tuesday, August 15, 2023
Monday, September 12, 2022
Monday, September 12, 2022
Monday, September 12, 2022
问题:母猪妊娠前期营养水平低于妊娠后期的营养水平。()...
Monday, September 12, 2022
Monday, September 12, 2022