{"common":{"save":0,"post_id":"6274","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"9703","post_id":"6274","mon_id":"1158739","chapter_id":"1158740","question":"<p>\u0110\u1ed9 cao c\u1ee7a âm mà m\u1ed9t v\u1eadt dao \u0111\u1ed9ng t\u1ea1o ra liên quan \u0111\u1ebfn \u0111\u1ea1i l\u01b0\u1ee3ng nào sau \u0111ây?<\/p>","options":["A. Biên \u0111\u1ed9 dao \u0111\u1ed9ng.","B. T\u1ed1c \u0111\u1ed9 dao \u0111\u1ed9ng.","C. T\u1ea7n s\u1ed1 dao \u0111\u1ed9ng.","D. C\u1ea3 3 \u0111\u1ea1i l\u01b0\u1ee3ng trên."],"correct":"3","level":"2","hint":"<p>- T\u1ea7n s\u1ed1 dao \u0111\u1ed9ng c\u1ee7a âm càng nh\u1ecf thì âm càng th\u1ea5p (càng tr\u1ea7m).<br \/>- T\u1ea7n s\u1ed1 dao \u0111\u1ed9ng c\u1ee7a âm càng l\u1edbn thì âm càng cao (càng b\u1ed5ng).<\/p>","answer":"<p><span style=\"color:#27ae60;\"><strong>\u0110\u1ed9 cao c\u1ee7a âm mà m\u1ed9t v\u1eadt dao \u0111\u1ed9ng t\u1ea1o ra liên quan \u0111\u1ebfn t\u1ea7n s\u1ed1 dao \u0111\u1ed9ng. <\/strong><\/span><span style=\"color:#27ae60;\"><br \/><strong>\u0110áp án \u0111úng: C. T\u1ea7n s\u1ed1 dao \u0111\u1ed9ng.<\/strong><\/span><br \/> <\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"147","test":"0","date":"2022-09-24 09:38:53","option_type":"txt","len":2},{"id":"9704","post_id":"6274","mon_id":"1158739","chapter_id":"1158740","question":"<p>M\u1ed9t âm thoa dao \u0111\u1ed9ng v\u1edbi t\u1ea7n s\u1ed1 25 Hz. Trong 1 phút âm thoa th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c<\/p>","options":["A. 25 dao \u0111\u1ed9ng.","B. 1500 dao \u0111\u1ed9ng.","C. 750 dao \u0111\u1ed9ng.","D. 50 dao \u0111\u1ed9ng.<br \/>\n "],"correct":"2","level":"2","hint":"<p>T\u1ea7n s\u1ed1 dao \u0111\u1ed9ng là s\u1ed1 dao \u0111\u1ed9ng th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c trong m\u1ed9t giây.<\/p>","answer":"<p><span style=\"color:#27ae60;\"><strong>Trong 1 phút âm thoa th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c: 25 . 60 = 1500 (dao \u0111\u1ed9ng).<br \/>\u0110áp án \u0111úng: B. 1500 dao \u0111\u1ed9ng.<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"147","test":"0","date":"2022-09-24 09:40:17","option_type":"txt","len":2},{"id":"9705","post_id":"6274","mon_id":"1158739","chapter_id":"1158740","question":"<p>Có 4 âm A, B, C, D v\u1edbi t\u1ea7n s\u1ed1 t\u01b0\u01a1ng \u1ee9ng là 587 Hz; 261 Hz; 698 Hz; 440 Hz. Em hãy s\u1eafp x\u1ebfp các âm trên theo th\u1ee9 t\u1ef1 âm tr\u1ea7m d\u1ea7n.<\/p>","options":["A. B – D – A – C.","B. D – B – A – C. ","C. A – B – C – D.","D. C – A – D – B."],"correct":"4","level":"2","hint":"<p>- T\u1ea7n s\u1ed1 dao \u0111\u1ed9ng c\u1ee7a âm càng nh\u1ecf thì âm càng th\u1ea5p (càng tr\u1ea7m).<br \/>- T\u1ea7n s\u1ed1 dao \u0111\u1ed9ng c\u1ee7a âm càng l\u1edbn thì âm càng cao (càng b\u1ed5ng).<\/p>","answer":"<p><span style=\"color:#27ae60;\"><strong>Ta có: 698 Hz > 587 Hz > 440 Hz > 261 Hz.<br \/>T\u01b0\u01a1ng \u1ee9ng v\u1edbi các âm có âm tr\u1ea7m d\u1ea7n là: C – A – D – B.<br \/>\u0110áp án \u0111úng: D. C – A – D – B.<\/strong><\/span><br \/> <\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"147","test":"0","date":"2022-09-24 09:41:39","option_type":"txt","len":2}]}
