当一酶促反应的速度达到最大速度的75%时,Km与[S]的关系是:()
A.[S]=Km
B.[S]=2Km
C.[S]=3Km
D.[S]=4Km
参考答案:C
按操作系统的分类,UNIX操作系统是( )。
A.批处理操作系统
B.实时操作系统
C.分时操作系统
D.单用户操作系统
The size of a flat-screen television is given as the length of the screen’s diagonal. How many square inches greater is the screen of a square 34-inch flat-screen television than a square 27-inch fiat-screen television ?()
A. 106.75
B. 213.5
C. 427
D. 729
E. 1,156