Qandalalar nima sababdan yarim qanotlilar turkumiga kiritilgan?

  1. ikki juft qanotlari yupqa
  2. birinchi juft qanotlarining oldingi qismi qalinlashgan, keying qismi yupqa va shaffof
  3. birinchi juft qanotlarining oldingi qismi yupqa, orqa qismi qalinlashgan
  4. ikki juft qanotlari qalin
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Question 685 of 1216
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