{"common":{"save":0,"post_id":"9989","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"10296","mon_id":"1160214","chapter_id":"1160227","post_id":"9989","question":"<p>Dân s\u1ed1 th\u1ebf gi\u1edbi t\u0103ng thêm bao nhiêu t\u1ec9 ng\u01b0\u1eddi<strong> t\u1eeb 1950 \u0111\u1ebfn 2000<\/strong>?.<\/p>","options":["A. 2,5 t\u1ec9 ng\u01b0\u1eddi.<br \/>\n ","B. 3,7 t\u1ec9 ng\u01b0\u1eddi.","C. 4,5 t\u1ec9 ng\u01b0\u1eddi.","D. 5,2 t\u1ec9 ng\u01b0\u1eddi."],"correct":"2","level":"2","hint":"<p>So sánh s\u1ed1 dân \u0111\u1ea7u và cu\u1ed1i giai \u0111o\u1ea1n.<\/p>","answer":"<p>\u0110áp án \u0111úng là: <span style=\"color:#16a085;\"><strong>B. 3,7 t\u1ec9 ng\u01b0\u1eddi.<\/strong><\/span><br \/>6,2 – 2,5 = 3,7 t\u1ec9 ng\u01b0\u1eddi.<\/p>","type":"choose","extra_type":"classic","user_id":"129","test":"0","date":"2025-08-23 13:54:33","option_type":"txt","len":2},{"id":"10297","mon_id":"1160214","chapter_id":"1160227","post_id":"9989","question":"<p>Trong<strong> giai \u0111o\u1ea1n 1950 – 2020<\/strong>, khu v\u1ef1c nào làm dân s\u1ed1 th\u1ebf gi\u1edbi t\u0103ng nhanh nh\u1ea5t?.<\/p>","options":["A. Các n\u01b0\u1edbc phát tri\u1ec3n.","B. Các n\u01b0\u1edbc \u0111ang phát tri\u1ec3n.","C. C\u1ea3 hai khu v\u1ef1c t\u0103ng \u0111\u1ec1u.","D. Không khu v\u1ef1c nào t\u0103ng."],"correct":"2","level":"2","hint":"<p>Hãy chú ý s\u1ef1 khác bi\u1ec7t rõ r\u1ec7t gi\u1eefa hai nhóm n\u01b0\u1edbc.<\/p>","answer":"<p>\u0110áp án \u0111úng là: <span style=\"color:#16a085;\"><strong>B. Các n\u01b0\u1edbc \u0111ang phát tri\u1ec3n.<\/strong><\/span><br \/>Dân s\u1ed1 t\u0103ng t\u1eeb 1,7 t\u1ec9 lên 6,5 t\u1ec9 (t\u0103ng 4,8 t\u1ec9).<\/p>","type":"choose","extra_type":"classic","user_id":"129","test":"0","date":"2025-08-23 14:45:25","option_type":"txt","len":2},{"id":"10298","mon_id":"1160214","chapter_id":"1160227","post_id":"9989","question":"<p><strong>N\u0103m 1950<\/strong>, dân s\u1ed1 các n\u01b0\u1edbc phát tri\u1ec3n chi\u1ebfm bao nhiêu ph\u1ea7n tr\u0103m dân s\u1ed1 th\u1ebf gi\u1edbi?.<\/p>","options":["A. 20%.","B. 28%.","C. 32%.","D. 40%."],"correct":"3","level":"2","hint":"<p>Tính t\u1ec9 l\u1ec7 gi\u1eefa dân s\u1ed1 phát tri\u1ec3n và dân s\u1ed1 toàn c\u1ea7u.<\/p>","answer":"<p>\u0110áp án \u0111úng là: <span style=\"color:#16a085;\"><strong>C. 32%.<\/strong><\/span><br \/>0,8 ÷ 2,5 = 0,32 (≈32%).<\/p>","type":"choose","extra_type":"classic","user_id":"129","test":"0","date":"2025-08-23 14:46:31","option_type":"txt","len":0}]}
