In the 1950s, _______________ were invented and quickly replaced the thousands of vacuum tubes used in electronic computers.
A) microchips
B) resistors
C) transistors
D) miniaturized circuits

Name: In the 1950s, _______________ were invented and quickly replaced the thousands of vacuum tubes used in electronic computers. A) microchips B) resistors C) transistors D) miniaturized circuits
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Transistors were invented in the 1950s and quickly replaced vacuum tubes in electronic computers.

In the 1950s, _______________ Were Invented and Quickly Replaced the Thousands