{"segment":[{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Chi\u1ebfu \u00e1nh s\u00e1ng tr\u1eafng qua m\u1ed9t t\u1ea5m l\u1ecdc m\u00e0u \u0111\u1ecf ta s\u1ebd \u0111\u01b0\u1ee3c \u00e1nh s\u00e1ng..... ","select":["A. m\u00e0u xanh","B. m\u00e0u \u0111\u1ecf","C. m\u00e0u l\u1ee5c","D. m\u00e0u ch\u00e0m"],"hint":"","explain":"<span class='basic_left'>Chi\u1ebfu \u00e1nh s\u00e1ng m\u00e0u tr\u1eafng qua m\u1ed9t t\u1ea5m l\u1ecdc m\u00e0u \u0111\u1ecf ta s\u1ebd \u0111\u01b0\u1ee3c \u00e1nh s\u00e1ng m\u00e0u \u0111\u1ecf<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3711},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"M\u1ed9t ng\u01b0\u1eddi \u0111\u1ee9ng ng\u1eafm m\u1ed9t c\u00e1i c\u1eeda c\u00e1ch xa 5m. C\u1eeda cao 2m. T\u00ednh \u0111\u1ed9 cao c\u1ee7a \u1ea3nh c\u00e1i c\u1eeda tr\u00ean m\u00e0ng l\u01b0\u1edbi c\u1ee7a m\u1eaft. Coi th\u1ec3 th\u1ee7y tinh nh\u01b0 m\u1ed9t th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5, c\u00e1ch m\u00e0ng l\u01b0\u1edbi 2cm. ","select":["A. 0,75 (cm)","B. 0,5 (cm)","C. 0,8 (cm)","D. 0,6 (cm)"],"hint":"","explain":"<span class='basic_left'>Gi\u1ea3 s\u1eed c\u00e1i c\u1eeda \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng \u0111o\u1ea1n AB, AB=2 cm, OA=5 cm, OA\u2019=2 cm <br\/>$\\vartriangle OAB\\sim \\vartriangle OA'B'\\Rightarrow \\dfrac{OA'}{OA}=\\dfrac{A'B'}{AB}$ <br\/>$\\Leftrightarrow \\dfrac{2}{500}=\\dfrac{A'B'}{200}\\Leftrightarrow A'B'=0.8$ (cm)<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":3712},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"M\u1ed9t v\u1eadt s\u00e1ng AB c\u00f3 d\u1ea1ng m\u0169i t\u00ean \u0111\u01b0\u1ee3c \u0111\u1eb7t vu\u00f4ng g\u00f3c v\u1edbi tr\u1ee5c ch\u00ednh c\u1ee7a m\u1ed9t th\u1ea5u k\u00ednh ph\u00e2n k\u00ec, \u0111i\u1ec3m A n\u1eb1m tr\u00ean tr\u1ee5c ch\u00ednh, c\u00e1ch th\u1ea5u k\u00ednh 20cm. Th\u1ea5u k\u00ednh c\u00f3 ti\u00eau c\u1ef1 20cm. \u1ea2nh c\u00e1ch th\u1ea5u k\u00ednh bao nhi\u00eau xentimet ? ","select":["A. 10cm","B. 12cm","C. 14cm","D. 16cm"],"hint":"","explain":"<span class='basic_left'>\u1ea2nh c\u1ee7a v\u1eadt AB l\u00e0 \u1ea3nh \u1ea3o <br\/>$\\vartriangle OAB\\sim \\vartriangle OA'B'$, $\\vartriangle B'BK\\sim \\vartriangle B'OF$ <br\/>$\\Leftrightarrow \\dfrac{AB}{A'B'}=\\dfrac{OA}{OA'}=\\dfrac{OB}{OB'}=\\dfrac{BK+OF}{OF}$ <br\/>$\\Leftrightarrow \\dfrac{AB}{A'B'}=\\dfrac{OA}{OA'}=\\dfrac{20+20}{20}=2$. <br\/>$\\Rightarrow OA'=\\dfrac{20}{2}=10$ (cm) <br\/>V\u1eady \u1ea3nh c\u00e1ch th\u1ea5u k\u00ednh 10 cm<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3713},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"M\u1ecdi \u00e1nh s\u00e1ng \u0111\u1ec1u c\u00f3 ... ","select":["A. t\u00e1c d\u1ee5ng h\u00f3a h\u1ecdc","B. t\u00e1c d\u1ee5ng sinh l\u00fd","C. t\u00e1c d\u1ee5ng t\u1eeb","D. t\u00e1c d\u1ee5ng nhi\u1ec7t"],"hint":"","explain":"<span class='basic_left'>M\u1ecdi \u00e1nh s\u00e1ng \u0111\u1ec1u c\u00f3 t\u00e1c d\u1ee5ng nhi\u1ec7t<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":3714},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop9/vatly/bai58/lv2/img\/5.jpg'\/><\/center>V\u1eadt k\u00ednh c\u1ee7a lo\u1ea1i m\u00e1y \u1ea3nh tr\u00ean h\u00ecnh 47.2 c\u00f3 ti\u00eau c\u1ef1 c\u1ee1 bao nhi\u00eau xentim\u00e9t? ","select":["A. 1 cm","B. 5 cm","C. 20 cm","D. 40 cm"],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3715},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0o sau \u0111\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng ph\u00e2n t\u00edch \u00e1nh s\u00e1ng tr\u1eafng? ","select":["A. M\u00e0u c\u1ee7a l\u1edbp d\u1ea7u m\u1ecfng tr\u00ean m\u1eb7t n\u01b0\u1edbc.","B. M\u00e0u tr\u00ean m\u00e0ng bong b\u00f3ng x\u00e0 ph\u00f2ng.","C. Hi\u1ec7n t\u01b0\u1ee3ng c\u1ea7u v\u1ed3ng.","D. Hi\u1ec7n t\u01b0\u1ee3ng kh\u00fac x\u1ea1 \u00e1nh s\u00e1ng."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":3716},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Ta kh\u00f4ng c\u00f2n th\u1ea5y hi\u1ec7n t\u01b0\u1ee3ng ph\u00e2n t\u00edch \u00e1nh s\u00e1ng tr\u1eafng th\u00e0nh c\u00e1c \u00e1nh s\u00e1ng m\u00e0u kh\u00e1c nhau khi ","select":["A. chi\u1ebfu m\u1ed9t ch\u00f9m \u00e1nh s\u00e1ng tr\u1eafng qua l\u0103ng k\u00ednh.","B. chi\u1ebfu m\u1ed9t ch\u00f9m \u00e1nh s\u00e1ng tr\u1eafng v\u00e0o m\u1eb7t ghi c\u1ee7a \u0111\u0129a CD.","C. chi\u1ebfu \u00e1nh s\u00e1ng \u0111\u01a1n s\u1eafc ( m\u1ed9t m\u00e0u ) qua l\u0103ng k\u00ednh.","D. chi\u1ebfu \u00e1nh s\u00e1ng kh\u00f4ng \u0111\u01a1n s\u1eafc qua l\u0103ng k\u00ednh."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":3717},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Chi\u1ebfu m\u1ed9t ch\u00f9m \u00e1nh s\u00e1ng tr\u1eafng qua l\u0103ng k\u00ednh. \u0110\u1eb7t ph\u00eda sau l\u0103ng k\u00ednh m\u1ed9t t\u1ea5m k\u00ednh m\u00e0u l\u1ee5c. Quan s\u00e1t ch\u00f9m \u00e1nh s\u00e1ng l\u00f3 ra ta th\u1ea5y ","select":["A. \u00e1nh s\u00e1ng \u0111\u1ee7 b\u1ea3y m\u00e0u.","B. \u00e1nh s\u00e1ng m\u00e0u l\u1ee5c.","C. kh\u00f4ng c\u00f3 \u00e1nh s\u00e1ng.","D. \u00e1nh s\u00e1ng tr\u1eafng."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3718},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"C\u00e1ch l\u00e0m n\u00e0o d\u01b0\u1edbi \u0111\u00e2y t\u1ea1o ra s\u1ef1 tr\u1ed9n c\u00e1c \u00e1nh s\u00e1ng m\u00e0u trong ph\u00f2ng t\u1ed1i? ","select":["A. Chi\u1ebfu m\u1ed9t ch\u00f9m s\u00e1ng \u0111\u1ecf v\u00e0o m\u1ed9t t\u1ea5m b\u00eca m\u00e0u v\u00e0ng.","B. Chi\u1ebfu m\u1ed9t ch\u00f9m s\u00e1ng \u0111\u1ecf qua m\u1ed9t k\u00ednh l\u1ecdc m\u00e0u v\u00e0ng.","C. Chi\u1ebfu m\u1ed9t ch\u00f9m s\u00e1ng tr\u1eafng qua m\u1ed9t k\u00ednh l\u1ecdc m\u00e0u \u0111\u1ecf v\u00e0 sau \u0111\u00f3 qua k\u00ednh l\u1ecdc m\u00e0u v\u00e0ng. ","D. Chi\u1ebfu m\u1ed9t ch\u00f9m s\u00e1ng \u0111\u1ecf v\u00e0 m\u1ed9t ch\u00f9m s\u00e1ng v\u00e0ng v\u00e0o m\u1ed9t t\u1edd gi\u1ea5y tr\u1eafng."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3719},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"V\u1ec1 m\u00f9a h\u00e8, ban ng\u00e0y khi ra \u0111\u01b0\u1eddng ph\u1ed1 ta kh\u00f4ng n\u00ean m\u1eb7c qu\u1ea7n \u00e1o m\u00e0u t\u1ed1i v\u00ec qu\u1ea7n \u00e1o m\u00e0u t\u1ed1i ","select":["A. H\u1ea5p th\u1ee5 \u00edt \u00e1nh s\u00e1ng, n\u00ean c\u1ea3m th\u1ea5y n\u00f3ng","B. H\u1ea5p th\u1ee5 nhi\u1ec1u \u00e1nh s\u00e1ng, n\u00ean c\u1ea3m th\u1ea5y n\u00f3ng","C. T\u00e1n x\u1ea1 \u00e1nh s\u00e1ng nhi\u1ec1u, n\u00ean c\u1ea3m th\u1ea5y n\u00f3ng","D. T\u00e1n x\u1ea1 \u00e1nh s\u00e1ng \u00edt, n\u00ean c\u1ea3m th\u1ea5y m\u00e1t"],"hint":"","explain":"<span class='basic_left'>Trong t\u00e1c d\u1ee5ng nhi\u1ec7t c\u1ee7a \u00e1nh s\u00e1ng th\u00ec c\u00e1c v\u1eadt c\u00f3 m\u00e0u t\u1ed1i h\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng \u00e1nh \u00e1ng m\u1ea1nh h\u01a1n c\u00e1c v\u1eadt c\u00f3 m\u00e0u s\u00e1ng. <br\/>Do \u0111\u00f3, v\u1ec1 m\u00f9a h\u00e8, ban ng\u00e0y khi ra \u0111\u01b0\u1eddng ph\u1ed1 ta kh\u00f4ng n\u00ean m\u1eb7c qu\u1ea7n \u00e1o m\u00e0u t\u1ed1i v\u00ec qu\u1ea7n \u00e1o m\u00e0u t\u1ed1i h\u1ea5p th\u1ee5 nhi\u1ec1u \u00e1nh s\u00e1ng, n\u00ean c\u1ea3m th\u1ea5y n\u00f3ng<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3720},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Khi quan s\u00e1t m\u1ed9t v\u1eadt m\u00e0u xanh l\u1ee5c b\u1eb1ng \u00e1nh s\u00e1ng m\u00e0u \u0111\u1ecf, ta th\u1ea5y v\u1eadt c\u00f3 m\u00e0u ","select":["A. \u0111\u1ecf.","B. xanh l\u1ee5c.","C. t\u00edm.","D. \u0111en."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":3721},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"\u00c1nh s\u00e1ng t\u00e1n x\u1ea1 tr\u00ean v\u1eadt \u0111\u01b0\u1ee3c truy\u1ec1n \u0111i ","select":["A. theo ph\u01b0\u01a1ng c\u1ee7a \u00e1nh s\u00e1ng t\u1edbi.","B. vu\u00f4ng g\u00f3c v\u1edbi ph\u01b0\u01a1ng c\u1ee7a \u00e1nh s\u00e1ng t\u1edbi.","C. song song v\u1edbi ph\u01b0\u01a1ng c\u1ee7a \u00e1nh s\u00e1ng t\u1edbi.","D. theo m\u1ecdi ph\u01b0\u01a1ng."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":3722},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Hai v\u1eadt c\u00f3 c\u1ea5u t\u1ea1o gi\u1ed1ng nhau, m\u1ed9t v\u1eadt c\u00f3 m\u00e0u s\u00e1ng v\u00e0 m\u1ed9t v\u1eadt c\u00f3 m\u00e0u t\u1ed1i th\u00ec hai v\u1eadt ","select":["A. \u0111\u1ec1u kh\u00f4ng c\u00f3 t\u00e1n x\u1ea1 \u00e1nh s\u00e1ng.","B. T\u00e1n x\u1ea1 \u00e1nh s\u00e1ng nh\u01b0 nhau.","C. V\u1eadt c\u00f3 m\u00e0u s\u00e1ng t\u00e1n x\u1ea1 \u00e1nh s\u00e1ng m\u1ea1nh h\u01a1n.","D. V\u1eadt c\u00f3 m\u00e0u t\u1ed1i t\u00e1n x\u1ea1 \u00e1nh s\u00e1ng m\u1ea1nh h\u01a1n"],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":3723},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"C\u00e1c v\u1eadt c\u00f3 m\u00e0u s\u1eafc kh\u00e1c nhau l\u00e0 v\u00ec ","select":["A. v\u1eadt c\u00f3 kh\u1ea3 n\u0103ng t\u00e1n x\u1ea1 t\u1ed1t t\u1ea5t c\u1ea3 c\u00e1c \u00e1nh s\u00e1ng m\u00e0u.","B. v\u1eadt kh\u00f4ng t\u00e1n x\u1ea1 b\u1ea5t k\u1ef3 \u00e1nh s\u00e1ng m\u00e0u n\u00e0o.","C. v\u1eadt ph\u00e1t ra c\u00e1c m\u00e0u kh\u00e1c nhau.","D. v\u1eadt c\u00f3 kh\u1ea3 n\u0103ng t\u00e1n x\u1ea1 l\u1ecdc l\u1ef1a c\u00e1c \u00e1nh s\u00e1ng m\u00e0u."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3724},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Chi\u1ebfu \u00e1nh s\u00e1ng tr\u1eafng qua k\u00ednh l\u1ecdc, ta th\u1ea5y k\u00ednh l\u1ecdc c\u00f3 m\u00e0u \u0111\u1ecf ta k\u1ebft lu\u1eadn ","select":["A. k\u00ednh l\u1ecdc h\u1ea5p th\u1ee5 \u00e1nh s\u00e1ng \u0111\u1ecf v\u00e0 t\u00e1n x\u1ea1 c\u00e1c m\u00e0u c\u00f2n l\u1ea1i.","B. k\u00ednh l\u1ecdc h\u1ea5p th\u1ee5 \u00e1nh s\u00e1ng \u0111\u1ecf, v\u00ec v\u1eady \u00e1nh s\u00e1ng qua k\u00ednh l\u1ecdc kh\u00f4ng c\u00f2n ch\u1ee9a m\u00e0u \u0111\u1ecf n\u1eefa.","C. k\u00ednh l\u1ecdc h\u1ea5p th\u1ee5 t\u1ea5t c\u1ea3 c\u00e1c m\u00e0u tr\u1eeb m\u00e0u \u0111\u1ecf, \u00e1nh s\u00e1ng qua k\u00ednh l\u1ecdc l\u00e0 \u00e1nh s\u00e1ng \u0111\u1ecf.","D. k\u00ednh l\u1ecdc t\u00e1n x\u1ea1 t\u1ea5t c\u1ea3 c\u00e1c m\u00e0u tr\u1eeb m\u00e0u \u0111\u1ecf, \u00e1nh s\u00e1ng qua k\u00ednh l\u1ecdc l\u00e0 \u00e1nh s\u00e1ng \u0111\u1ecf."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":3725},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"M\u1ed9t v\u1eadt c\u00f3 m\u00e0u tr\u1eafng \u1edf ngo\u00e0i tr\u1eddi s\u00e1ng. Chi\u1ebfu v\u00e0o v\u1eadt \u00e1nh s\u00e1ng m\u00e0u th\u00ec s\u1ebd nh\u00ecn th\u1ea5y v\u1eadt c\u00f3 ","select":["A. m\u00e0u \u0111en.","B. m\u00e0u tr\u1eafng.","C. m\u00e0u c\u1ee7a \u00e1nh s\u00e1ng chi\u1ebfu v\u00e0o v\u1eadt.","D. m\u00e0u kh\u00e1c v\u1edbi \u00e1nh s\u00e1ng chi\u1ebfu v\u00e0o v\u1eadt."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":3726},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t n\u00e0o c\u1ee7a \u00e1nh s\u00e1ng m\u00e0 m\u1ed9t s\u1ed1 \u0111\u1ed9ng v\u1eadt c\u00f3 kh\u1ea3 n\u0103ng t\u1ef1 \u0111\u1ed9ng thay \u0111\u1ed5i m\u00e0u c\u1ee7a c\u01a1 th\u1ec3 cho ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i tr\u01b0\u1eddng? ","select":["A. Kh\u00fac x\u1ea1 \u00e1nh s\u00e1ng m\u00e0u c\u1ee7a m\u00f4i tr\u01b0\u1eddng.","B. T\u00e1n x\u1ea1 \u00e1nh s\u00e1ng m\u00e0u c\u1ee7a m\u00f4i tr\u01b0\u1eddng.","C. H\u1ea5p th\u1ee5 \u00e1nh s\u00e1ng m\u00e0u c\u1ee7a m\u00f4i tr\u01b0\u1eddng.","D. Ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng m\u00e0u c\u1ee7a m\u00f4i tr\u01b0\u1eddng."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3727},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Ban ng\u00e0y l\u00e1 c\u00e2y ngo\u00e0i \u0111\u01b0\u1eddng c\u00f3 m\u00e0u xanh v\u00ec ","select":["A. ch\u00fang h\u1ea5p th\u1ee5 t\u1ed1t \u00e1nh s\u00e1ng xanh trong ch\u00f9m \u00e1nh s\u00e1ng tr\u1eafng c\u1ee7a m\u1eb7t tr\u1eddi.","B. ch\u00fang bi\u1ebfn \u0111\u1ed5i s\u00e1ng tr\u1eafng trong ch\u00f9m \u00e1nh s\u00e1ng c\u1ee7a m\u1eb7t tr\u1eddi.","C. ch\u00fang t\u00e1n x\u1ea1 t\u1ed1t \u00e1nh s\u00e1ng xanh trong ch\u00f9m \u00e1nh s\u00e1ng tr\u1eafng c\u1ee7a m\u1eb7t tr\u1eddi.","D. ch\u00fang kh\u00fac x\u1ea1 t\u1ed1t \u00e1nh s\u00e1ng xanh trong ch\u00f9m \u00e1nh s\u00e1ng tr\u1eafng c\u1ee7a m\u1eb7t tr\u1eddi."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":3728},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"M\u1ed9t v\u1eadt c\u00f3 m\u00e0u \u0111en v\u00ec ","select":["A. v\u1eadt ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng m\u00e0u \u0111en \u0111\u1ebfn m\u1eaft ta.","B. v\u1eadt ph\u1ea3n x\u1ea1 to\u00e0n b\u1ed9 \u00e1nh s\u00e1ng chi\u1ebfu t\u1edbi n\u00f3.","C. v\u1eadt t\u00e1n x\u1ea1 m\u1ea1nh \u00e1nh s\u00e1ng m\u00e0u \u0111en v\u00e0o m\u1eaft ta.","D. v\u1eadt h\u1ea5p th\u1ee5 m\u1ecdi \u00e1nh s\u00e1ng chi\u1ebfu \u0111\u1ebfn n\u00f3."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":3729},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" \u00c1nh s\u00e1ng c\u00f3 t\u00e1c d\u1ee5ng nhi\u1ec7t khi n\u0103ng l\u01b0\u1ee3ng \u00e1nh s\u00e1ng bi\u1ebfn th\u00e0nh","select":["A. \u0110i\u1ec7n n\u0103ng","B. Nhi\u1ec7t n\u0103ng","C. C\u01a1 n\u0103ng","D. H\u00f3a n\u0103ng"],"hint":"","explain":"<span class='basic_left'> <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3730}],"lesson":{"save":0,"level":2}}