<html><head><title>Bài tập trắc nghiệm</title><meta charset="utf-8"></head><body><center><table border="0"><tr><th><iframe src="<iframe src="https://drive.google.com/file/d/18pQzQfS4zBhTPSgunkvA5NJQ_3KUgaQn/preview" width="640" height="480" allow="autoplay"></iframe>" width="1000" height="600" frameborder="0" marginheight="0" marginwidth="0">Đang tải…</iframe></th><th><iframe src="<iframe src="https://docs.google.com/forms/d/e/1FAIpQLSfpjyg5a3bOiqA_Z4dDm3MY8t1KMWU4tEk8YeIljUgn0sDv7A/viewform?embedded=true" width="640" height="576" frameborder="0" marginheight="0" marginwidth="0">Đang tải…</iframe>" width="360" height="580" frameborder="0" marginheight="0" marginwidth="0">Đang tải…</iframe><center><font color="blue">Thiết kế: Phạm văn Thủy </font></center></th></tr></table></center></body></html>