______ she said this, she regretted it.
A.The time
B.The moment
C.The hour
D.The day
答案:B
6-磷酸果糖激酶-1的最强别构激活剂是
A.ADP
B.AMP
C.2,6-双磷酸果糖
D.ATP
在公务接待中,分别有()()()三种接待规格。