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Submitted URL: http://test150.udn.vn/
Effective URL: https://khaosat.me/survey/trac-nghiem-tin-hoc-f9c0751
Submission: On November 09 via api from US — Scanned from US
Effective URL: https://khaosat.me/survey/trac-nghiem-tin-hoc-f9c0751
Submission: On November 09 via api from US — Scanned from US
DOM tree The "DOM" is the Document Object Model