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Class 7 Science Competitive Exam: Certification Test 1952

Sound Waves and Echoes Quiz App & e-Book: MCQ 1952

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MCQ: 1952

Bats also use 'ultrasound' to prevent

  1. predators
  2. homes
  3. preys
  4. obstacles
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Sound Waves and Echoes Competitive Exam: Class 7 Science App & eBook Quiz

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Sound Waves and Echoes Quiz App (iOS & Android)

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