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Pertanyaan
Thomas Edison ... two thousand different materials in search of a proper filament for the light ... His assistant complained, " All our work is useless". Edison replied ..., "Oh we have come a long way and we have learned a lot. We know that there are two thousand elements which we cannot use to make a good light bulb".
suprisingly
accidentally
perfectly
confidently
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S. Sumiati
Master Teacher
Mahasiswa/Alumni Universitas Pendidikan Indonesia
51
4.0 (1 rating)
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