<html><head><title>Bài tập trắc nghiệm</title><meta charset="utf-8"></head><body><center><table border="0"><tr><th><iframe src="https://drive.google.com/file/d/1wrVWRCJhdULvYaz8qj5y_sY3mna_pBpM/preview" width="1000" height="600" frameborder="0" marginheight="0" marginwidth="0">Đang tải…</iframe></th><th>ocs.google.com<iframe src="https://docs.google.com/forms/d/e/1FAIpQLSdEm1Ws9VvTWFPBtlpOWQYNd7FE6pZYy3X7jniSjhUX98LI8w/viewform" width="360" height="580" frameborder="0" marginheight="0" marginwidth="0">Đang tải…</iframe><center><font color="blue">giáo viên : Hoàng Ngọc Linh </font></center></th></tr></table></center></body></html>