Saturday, September 17, 2022
问题:基础氮代谢的常用评定方法是()。A、外加氨基酸法B、无氮日粮法C、氮沉积法D、回归法...
Thursday, November 10, 2022
问题:粗纤维的饲养作用是()。A、可防止反刍动物瘤胃异常B、调节微生物群落C、饱胃感D、刺激胃肠蠕动,有利于排便E、提高养分浓度...
Wednesday, August 30, 2023
Thursday, August 10, 2023
Thursday, September 15, 2022
问题:矿物质饲料中的磷酸氢钙可作为动物()和()的补充来源。...
Saturday, December 16, 2023
Saturday, September 17, 2022
Saturday, September 17, 2022
问题:配合饲料的基本类型有()、()、()和()四种。...
Thursday, August 10, 2023
Saturday, September 17, 2022
Monday, September 12, 2022
问题:矿物质饲料中食盐可用来补充动物所需的()和()之需,其中动物饲料中的用量一般为()...
Wednesday, August 30, 2023
Thursday, September 15, 2022
Monday, September 12, 2022
问题:青饲料中蛋白质含量较(),也是供应家畜()营养的优良来源。其中含...
Saturday, September 17, 2022
Saturday, December 16, 2023
Thursday, September 15, 2022
问题:根据经济类型分类,绵羊可以分为哪些类(各举一例)。...
Monday, September 12, 2022
问题:哺乳仔猪贫血是由于母乳所能提供的铁量大大少于仔猪正常生长所需的铁...
Saturday, September 17, 2022
问题:析因法比综合法更科学合理,但所测得的需要量一般比综合法()。...
Monday, September 12, 2022