Đáp án tham khảo có thể sai: 1a, 2a, 3a, 4b, 5b, 6d, 7c, 8a, 9d, 10d, 11d, 12b, 13b, 14b, 15b, 16c, 17a, 18a, 19a, 20d, 21b, 22d, 23d, 24c, 25b, 26b, 27a, 28a, 29c, 30b, 31b, 32a, 33b, 34d, 35a, 36a, 37a, 38b, 39d, 40c, 41b, 42b, 43a, 44d, 45a, 46b, 47d, 48c, 49d, 50b, source : MGT103_RE_SU23_517405