下述属于灭菌法的是Before we administer first aid to a victim, it is very important for us将原本在N培养基中生长的大肠杆菌转移到N培养基中培养一代,然后再将细菌转回N培养基中培养四代,此时分离细菌DNA,测定DNA的沉降系数,问这时N DNA与N-N杂合DNA的比例为多少The () choice for a consumer, therefore, is the choice among the available ones that will enable him or her to maximize utility.B注册会计师执行下列审计程序,其中不属于应实施的审计程序的是()。