题目内容
Solid materials can be classified into the following types ( )
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( ) is a combination of all symmetry elements in the internal structure of the crystal, specifically a combination of all symmetry elements in the unit cell.
______ materials compose of multiple ordered regions, which are separated from one another by grain boundaries.
In 1958, Dr. Jack Kilby of Texas instruments company invented the first integrated circuit, including 12 devices on Ge. ( )
The first CPU was Intel's 4004 microprocessor in 1971. ( )
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