三态门除了有高、低电平输出外,还有第三个状态,即高阻状态。
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CMOS门电路闲置的输入端可以悬空不接。( )
A. 对
B. 错
74LS00芯片内部的4个二输入与非门,因为共用电源和地,因此彼此不独立。( )
A. 对
B. 错
The Minister of Education is visiting our campus, by our university president.
A. accompanied
B. disbelieved
C. undertaken
D. embarrassed
Our university enrolls more students than our city’s other two colleges .
A. combined
B. doubted
C. crushed
D. stayed