【单选题】A bacterium of genotype a+b+c+d+is the donor in a cotransformation mapping. The recipient is a-b-c-d-. Data from the transformed cells are shown below.a+and b+ 2a+and c+ 0a+and d+ 5b+and c+ 5b+and d+...
【简答题】AgBr sol was prepared by mixing 0.08mol/dm3 NaBr solution and 0.10mol/dm3 AgNO3 solution of the same volume,and the following electrolyte solutions of the same concentration were added respectively. W...