{"save":1,"level":1,"time":"0","total":40,"point":5,"segment":[{"id":"5529","test_id":"537","question":"<p>Th&agrave;nh ph\u1ea7n ch&iacute;nh c\u1ee7a mu\u1ed1i \u0103n l&agrave;:<\/p>","options":["<strong>A.<\/strong> CaCO<sub>3<\/sub>.","<strong>B.<\/strong> Mg(NO<sub>3<\/sub>)<sub>2<\/sub>.","<strong>C.<\/strong> BaCl<sub>2<\/sub>.","<strong>D.<\/strong> NaCl."],"correct":"4","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>D.<\/strong> NaCl.<\/span><\/p><p>Th&agrave;nh ph\u1ea7n ch&iacute;nh c\u1ee7a mu\u1ed1i \u0103n l&agrave; NaCl.<\/p>","type":"choose","user_id":"131","test":"3","date":"2025-06-14 08:27:38"},{"id":"5530","test_id":"537","question":"<p>Kim lo\u1ea1i tungsten (W) \u0111\u01b0\u1ee3c d&ugrave;ng l&agrave;m d&acirc;y t&oacute;c b&oacute;ng \u0111&egrave;n s\u1ee3i \u0111\u1ed1t. \u1ee8ng d\u1ee5ng n&agrave;y d\u1ef1a tr&ecirc;n t&iacute;nh ch\u1ea5t&nbsp;n&agrave;o c\u1ee7a kim lo\u1ea1i W?<\/p>","options":["<strong>A.<\/strong> Nhi\u1ec7t \u0111\u1ed9 n&oacute;ng ch\u1ea3y cao.","<strong>B.<\/strong> Kh\u1ed1i l\u01b0\u1ee3ng ri&ecirc;ng l\u1edbn.","<strong>C.<\/strong> \u0110\u1ed9 c\u1ee9ng cao.","<strong>D.<\/strong> T&iacute;nh d\u1ebbo cao."],"correct":"1","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>A.<\/strong> Nhi\u1ec7t \u0111\u1ed9 n&oacute;ng ch\u1ea3y cao.<\/span><\/p><p>D&acirc;y t&oacute;c b&oacute;ng \u0111&egrave;n s\u1ee3i \u0111\u1ed1t hi ho\u1ea1t \u0111\u1ed9ng c&oacute; nhi\u1ec7t \u0111\u1ed9 r\u1ea5t cao, v&igrave; v\u1eady d&acirc;y t&oacute;c b&oacute;ng \u0111&egrave;n ph\u1ea3i l&agrave;m t\u1eeb kim lo\u1ea1i c&oacute; nhi\u1ec7t \u0111\u1ed9 n&oacute;ng ch\u1ea3y cao (nh\u01b0 W).<\/p>","type":"choose","user_id":"131","test":"1","date":"2025-06-14 08:30:07"}]}