Proper infection dosage and routes were selected to make the chickens artificially infect avian colibacillosis successfully.选择适宜的攻毒剂量和攻毒途径,诱发淮南麻黄鸡大肠杆菌病.The dosage of technological parameter and feasible emulsification an...
We need to find ways of dealing creatively and usefully with our feelings.我们需要找到一些既有创意又实用的方法来调整我们的情绪。In some cases the slag can be disposed of usefully.有时炉渣能有用处.We can usefully distinguish between four main kinds of inte...