The two elements that are frequently used for making
transistors are
1 Boron and aluminium
2 Silicon and germanium
3 Iridium and tungsten
4 Niobium and columbium
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Which of the following is commonly called a ‘polyamide’? 1 Rayon 2 Orlon 3 Terylene 4 Nylon
what does the haversian central canal in each osteon contains?
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