题型:问答题 简答题 关于效应强度的概念正确的是()A.药物产生最大效应的能力B.药物达到一定效应所需的剂量C.反映药物本身的内在活性D.反映药物与受体的亲和力E.常用产生50%最大效应时的剂量来表示 查看答案
题型:问答题 简答题 At first he refused to admit his guilt but when he was shown the evidence he ______ and confessed (坦白).A.broke downB.lay downC.got downD.put down 查看答案