সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন
Which of the following is the working principle of a washing machine?
Which of the following is the working principle of a washing machine?
- ক. reverse osmosis
- খ. diffusion
- গ. centrifugation
- ঘ. dialysis
সঠিক উত্তরঃ centrifugation
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- Which of the following is not a radio active metrial?
- The increase in carbon dioxide in the atmosphere cause---
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Basic Information of Daily Science, Inventions and...