题目内容

The NAND function is equivalent to an AND function with a NOT function at the output. The output is 0 only if both inputs are 1; if one input is 1 and the other is 0, or if both inputs are 0, then the output is 1.

A. 对
B. 错

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In a 14-pin 74LS00 chip, each gate uses two pins for input and one pin for its output, and the remaining two contacts supply power ( +5 V ) and connect the ground.

A. 对
B. 错

Like a standard computer, the microcontroller includes a (), RAM, ROM, I/O ports, and timers.

A. monitor
B. keyboard
C. notebook
D. processor

Typical output devices of a microcontroller include (), LEDs, and LCD displays.

A. relays
B. sensors
C. keyboard
D. radiofrequency devices

The second function of the MCU ports is used to implement ().

A. output data
B. read the state of a sensor
C. pulses
D. external interrupting

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