题目内容

The main components of MCS-51 CPU are ()

Arithmetic unit and controller
B. Adder, register
C. Arithmetic unit, register
D. Arithmetic unit, instruction decoder

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The main components of the computer are ()

A. CPU, memory, I / O
B. CPU, keyboard, monitor
C. Host, external device
D. All of the above

Intel 8051 CPU is a () bit MCU

A. 16
B. 4
C. 8
D. Quasi-16(准16位)

For Intel 8051, EA pin is always ()

A. Grounding
B. Connect the power supply
C. Hanging in the air
D. No

In computer, ‘a ’is represented by ()

A. BCD code
B. Two-one-one decimal code
C. Remaining three yards(余三码)
D. ASCII code