{"save":1,"level":1,"time":"45","total":20,"point":5,"segment":[{"id":"1978","test_id":"352","question":"<p>Cho h&igrave;nh vu&ocirc;ng ABCD c&oacute; c\u1ea1nh b\u1eb1ng a. Trong c&aacute;c m\u1ec7nh \u0111\u1ec1 sau, t&igrave;m m\u1ec7nh \u0111\u1ec1&nbsp;<strong>sai<\/strong>:<\/p>","options":["A.&nbsp;<span class=\"math-tex\">$\\overrightarrow{AB} . \\overrightarrow{AD} = 0$<\/span>","B.&nbsp;<span class=\"math-tex\">$\\overrightarrow{AB} . \\overrightarrow{AC} = a^2$<\/span>","C.&nbsp;<span class=\"math-tex\">$\\overrightarrow{AC} . \\overrightarrow{CB} = -a^2$<\/span>","D.&nbsp;<span class=\"math-tex\">$\\overrightarrow{AB} . \\overrightarrow{CD} = a^2$<\/span>"],"correct":"4","answer":"","type":"choose","user_id":"107","test":"1","date":"2020-05-30 14:03:22"},{"id":"1979","test_id":"352","question":"<p>Trong c&aacute;c h\u1ec7 th\u1ee9c sau, h\u1ec7 th\u1ee9c n&agrave;o \u0111&uacute;ng?<\/p>","options":["A.&nbsp;<span class=\"math-tex\">$sin \\alpha ^2 + cos \\alpha ^2 =1$<\/span>","B.&nbsp;<span class=\"math-tex\">$sin^2\\alpha + cos^2\\alpha=1$<\/span>","C.&nbsp;<span class=\"math-tex\">$sin2\\alpha + cos2\\alpha = 1$<\/span>","D.&nbsp;<span class=\"math-tex\">$sin^2\\alpha + cos\\alpha^2 = 1$<\/span>"],"correct":"2","answer":"","type":"choose","user_id":"107","test":"0","date":"2020-05-30 14:06:01"}]}