Bài 30 BTVN

<p>Đáp án BTVN buổi trước: <a href="https://docs.google.com/document/d/1O9Yswu1040ObbNeh3wKuwHV69nTB7BFY/ed… href="https://docs.google.com/document/d/17DgBms8Lk1GpQxKLxuUAvWOjTRC4NaDG/ed… So sánh:</p><p><a href="https://docs.google.com/document/d/14bLUMrSqOkSoMilCRd_suFAenp9eF8rc/ed…;