调痢生治疗动物拉稀等疾病有良好效果,其作用机理是()。
A、抗菌作用
B、调整动物体内的菌群以使之达到平衡
C、促进消化
D、提供必需氨基酸,增强机体对各种疾病的抵抗力
参考答案:B
You can't imagine ____ when they received these nice Christmas presents.
A.how they were excited
B.how excited they were
C.how excited were they
D.they were how excited
第二净化水场的检油泵的设备编号是()
A.P111
B.P112
C.P113
D.P114