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1 කථානායක
1 පරිච්ඡේද
7 කොටස්
කථානායක
පරිච්ඡේද
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0:01පරිච්ඡේදය 1: How can we identify the best solution? 13s · Speaker 1
How can we identify the best solution? A. We may want to consult some experts. B. Everyone must show identification. C. In the laboratory.