【简答题】04-6-18*以丙酮酸为底物的丙酮酸脱羧酶Km=4×10-4摩尔/升,在该酶的反应系统中丙酮酸的浓度为3.6mM,则该酶催化丙酮酸脱羧反应的速度达到最大反应速度的_____ % 。
【简答题】根据工作频率的不同,射频识别系统通常可以分为( )、( )和( )系统。
【单选题】Which of the following statements is FALSE according to the passage?
A.
The writer's intended journey created particular difficulties in his learning of Arabic.
B.
The reading and writing of the Arabic script. gave the writer lasting pleasure.
C.
The writer found learning Arabic was a grueling experience but rewarding.
D.
The writer regarded Ahmed's praise pod his pronunciation as tongue-in-cheek.
【简答题】根据工作频率的不同,射频识别系统通常可以分为( )、( )和( )系统。
【简答题】根据工作频率的不同,射频识别系统通常可以分为( )、( )和( )系统。
【简答题】以丙酮酸为底物的丙酮酸脱羧酶 Km = 4 × 10 -4 摩尔 / 升,在该酶的反应系统中丙酮酸的浓度为 3.6mM ,则该酶催化丙酮酸脱羧反应的速度达到最大反应速度的 % 。
【简答题】颅面骨骼的生长发育方式有___________________、________________、__________________。