Chapter 20: Class 7 Science Exam Tests
Class 7 Science MCQs - Chapter 20
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MCQ 11: Flu is caused by
MCQ 12: Hair in nostrils help to
MCQ 13: The main cause of 'asthma' is
MCQ 14: The 'air' is made warm by
MCQ 15: The respiration that does not involve the presence of oxygen is known as
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