Grammar Questions for class 6. Help me to find out the answers
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Grammar Questions for class 6. Help me to find out the answers
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Nanotechnology is a field of research and innovation concerned with building 'things' - generally, materials and devices - on the scale of atoms and molecules. A nanometre is one-billionth of a metre: ten times the diameter of a hydrogen atom. The diameter of a human hair is, on average, 80,000 nanometres.
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