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How we can decrease drop out ratio of students??
what is 57 cube
should teachers students relationship friendly
✅जीव-जंतु शीत ऋतु में अधिक खाना खाते हैं, क्यों?
Identify the image ?
What are the disadvantage of solar energy
(a) A large surface area is required collect the solar
(b) Daily average of solar energy varies from 4 to 7 kwh/m2
(c) Highly hazardous toxic material is used in the manufacturing of solar device.
(d) All of the above are disadvantages.