题目内容

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

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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

In a microcontroller, () is used to store the program because this kind memory can retain the stored information even when not powered.

A. RAM
B. ROM
C. Flash
D. Register