需要足量令舒发挥快速效应的最主要原因()。
A.膜受体比胞浆受体数量多
B.膜受体比胞浆受体数量少
C.膜受体比胞浆受体亲和力高
D.膜受体比胞浆受体亲和力低
参考答案:B, D
It's reported that by the end of this week the stock exchange________ by about 10%.
A.will have risen
B.has risen
C.will be rising
D.has been rising
某计算机主频为8MHz,每个机器周期平均2个时钟周期,每条指令平均有2.5个机器周期,则该机器的平均指令执行速度为 ______MIPS。