<https://ketoanvn.org/giai-bt-bai-27-trang-172-sgk-vat-ly-11-phan-xa-toan-phan-hoc247/#webpage>
<http://schema.org/datePublished>
"2020-06-22T21:26:58+00:00"^^<http://schema.org/Date>
<https://ketoanvn.org/giai-bt-bai-27-trang-172-sgk-vat-ly-11-phan-xa-toan-phan-hoc247/>