【判断题】高度专一性是指酶对底物有严格的选择性。( )
【简答题】Since it is to ask for sick leave, he often uses it as an excuse for staying away from school.
【单选题】一种原子核经过放射性衰变后的子体,其质量数发生变化,这种过程可能是:( )
【单选题】-----Lin Tao’s spoken English is very good. ----- _______. He often talks with foreigners.
【简答题】酶的底物专一性(substratespecificity)(名词解释)