Việc đổi sách giáo khoa có cần thiết không?
[{"answer":"C\u1ea7n thi\u1ebft","total":183,"male":105,"female":78},{"answer":"Kh\u00f4ng","total":216,"male":98,"female":118},{"answer":"\u0110\u1ed5i s\u00e1ch nh\u01b0ng kh\u00f4ng qu\u00e1 c\u1ea3i bi\u00ean so v\u1edbi ki\u1ebfn th\u1ee9c chung","total":382,"male":164,"female":218},{"answer":"S\u00e1ch ph\u1ea3i b\u00e1m s\u00e1t theo hi\u1ec7n \u0111\u1ea1i","total":160,"male":77,"female":83},{"answer":"Kh\u00f4ng c\u00f3 \u00fd ki\u1ebfn","total":43,"male":18,"female":25}]
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