在组合逻辑控制器中,一般采用三级时序体制,它们是
A.指令周期、CPU周期和节拍电位
B.指令周期、CPU周期和时钟脉冲
C.指令周期、节拍电位和时钟脉冲
D.CPU周期、节拍电位和时钟脉冲
正确答案是D
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Complete the following sentence with a (compound) word derived from the one given in bracket.
So many people exhaust their health gaining wealth, and then have to spend their wealth to( )their health. (gain)
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