{"segment":[{"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 sau \u0111\u00e2y c\u00f3 th\u1ec3 ki\u1ec3m tra xem \u00e2m thoa c\u00f3 dao \u0111\u1ed9ng kh\u00f4ng?","select":["A. D\u00f9ng tay gi\u1eef ch\u1eb7t hai nh\u00e1nh c\u1ee7a \u00e2m thoa th\u00ec kh\u00f4ng th\u1ea5y \u00e2m ph\u00e1t ra n\u1eefa","B. \u0110\u1eb7t con l\u1eafc b\u1ea5c s\u00e1t m\u1ed9t nh\u00e1nh c\u1ee7a \u00e2m thoa khi \u00e2m thoa ph\u00e1t ra \u00e2m","C. D\u00f9ng m\u1ed9t t\u1edd gi\u1ea5y \u0111\u1eb7t n\u1ed5i tr\u00ean m\u1eb7t m\u1ed9t ch\u1eadu n\u01b0\u1edbc. Khi \u00e2m thoa ph\u00e1t \u00e2m, ta ch\u1ea1m m\u1ed9t nh\u00e1nh c\u1ee7a \u00e2m thoa v\u00e0o g\u1ea7n m\u00e9p t\u1edd gi\u1ea5y th\u00ec th\u1ea5y n\u01b0\u1edbc b\u1eafn t\u00f3e t\u1edd gi\u1ea5y","D. C\u1ea3 3 c\u00e1ch tr\u00ean"],"hint":"","explain":"<span class='basic_left'>C\u1ea3 3 c\u00e1ch tr\u00ean \u0111\u1ec1u c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 ki\u1ec3m tra xem \u00e2m thoa c\u00f3 dao \u0111\u1ed9ng kh\u00f4ng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2211},{"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":"\u00c2m thanh \u0111\u01b0\u1ee3c t\u1ea1o ra nh\u1edd:","select":["A. Nhi\u1ec7t","B. \u0110i\u1ec7n","C. \u00c1nh s\u00e1ng","D. Dao \u0111\u1ed9ng"],"hint":"","explain":"<span class='basic_left'>\u00c2m thanh \u0111\u01b0\u1ee3c t\u1ea1o ra nh\u1edd dao \u0111\u1ed9ng c\u01a1 h\u1ecdc.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2212},{"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":"V\u1eadt ph\u00e1t ra \u00e2m trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p n\u00e0o d\u01b0\u1edbi \u0111\u00e2y?","select":["A. Khi k\u00e9o c\u0103ng v\u1eadt","B. Khi u\u1ed1n cong v\u1eadt","C. Khi l\u00e0m v\u1eadt dao \u0111\u1ed9ng","D. Khi n\u00e9n v\u1eadt"],"hint":"","explain":"<span class='basic_left'>\u00c2m thanh \u0111\u01b0\u1ee3c t\u1ea1o ra nh\u1edd dao \u0111\u1ed9ng c\u01a1 h\u1ecdc. N\u00ean Khi l\u00e0m v\u1eadt dao \u0111\u1ed9ng th\u00ec v\u1eadt ph\u00e1t ra \u00e2m thanh.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2213},{"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":"Ta nghe \u0111\u01b0\u1ee3c ti\u1ebfng h\u00e1t c\u1ee7a ca s\u0129 tr\u00ean tivi. V\u1eady \u0111\u00e2u l\u00e0 ngu\u1ed3n \u00e2m?","select":["A. Ng\u01b0\u1eddi ca s\u0129 ph\u00e1t ra \u00e2m","B. M\u00e0ng loa trong tivi dao \u0111\u1ed9ng ph\u00e1t ra \u00e2m","C. T\u1eeb n\u00fam \u0111i\u1ec1u ch\u1ec9nh \u00e2m thanh c\u1ee7a chi\u1ebfc ti vi","D. M\u00e0n h\u00ecnh tivi dao \u0111\u1ed9ng ph\u00e1t ra \u00e2m"],"hint":"","explain":"<span class='basic_left'>\u00c2m thanh \u0111\u01b0\u1ee3c t\u1ea1o ra nh\u1edd dao \u0111\u1ed9ng c\u01a1 h\u1ecdc n\u00ean m\u00e0ng loa trong tivi dao \u0111\u1ed9ng ph\u00e1t ra \u00e2m.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2214},{"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":"Khi ta nghe th\u1ea5y ti\u1ebfng nh\u1ea1c t\u1eeb \u0111\u00e0i ph\u00e1t ra th\u00ec:","select":["A. M\u00e0ng loa c\u1ee7a \u0111\u00e0i b\u1ecb c\u0103ng ra.","B. M\u00e0ng loa c\u1ee7a \u0111\u00e0i b\u1ecb n\u00e9n l\u1ea1i.","C. M\u00e0ng loa c\u1ee7a \u0111\u00e0i b\u1ecb dao \u0111\u1ed9ng.","D. M\u00e0ng loa c\u1ee7a \u0111\u00e0i b\u1ecb d\u1ecbch chuy\u1ec3n."],"hint":"","explain":"<span class='basic_left'>M\u00e0ng loa c\u1ee7a \u0111\u00e0i b\u1ecb dao \u0111\u1ed9ng ph\u00e1t ra \u00e2m, \u0111\u00f3 ch\u00ednh l\u00e0 \u00e2m thanh ta nghe \u0111\u01b0\u1ee3c.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2215},{"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":"Khi b\u00e1c b\u1ea3o v\u1ec7 g\u00f5 tr\u1ed1ng, tai ta nghe th\u1ea5y ti\u1ebfng tr\u1ed1ng. V\u1eadt n\u00e0o ph\u00e1t ra \u00e2m \u0111\u00f3?","select":["A. Tay b\u00e1c b\u1ea3o v\u1ec7 g\u00f5 tr\u1ed1ng","B. D\u00f9i tr\u1ed1ng","C. M\u1eb7t tr\u1ed1ng","D. Kh\u00f4ng kh\u00ed xung quanh tr\u1ed1ng"],"hint":"","explain":"<span class='basic_left'>Khi b\u00e1c b\u1ea3o v\u1ec7 g\u00f5 tr\u1ed1ng, m\u1eb7t tr\u1ed1ng dao \u0111\u1ed9ng ph\u00e1t ra \u00e2m thanh.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2216},{"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":"Khi tr\u1eddi m\u01b0a d\u00f4ng, ta th\u01b0\u1eddng nghe th\u1ea5y ti\u1ebfng s\u1ea5m. V\u1eady v\u1eadt n\u00e0o \u0111\u00e3 dao \u0111\u1ed9ng ph\u00e1t ra ti\u1ebfng s\u1ea5m?","select":["A. C\u00e1c \u0111\u00e1m m\u00e2y va ch\u1ea1m v\u00e0o nhau n\u00ean \u0111\u00e3 dao \u0111\u1ed9ng ph\u00e1t ra ti\u1ebfng s\u1ea5m","B. C\u00e1c tia l\u1eeda \u0111i\u1ec7n kh\u1ed5ng l\u1ed3 dao \u0111\u1ed9ng g\u00e2y ra ti\u1ebfng s\u1ea5m","C. Kh\u00f4ng kh\u00ed xung quanh tia l\u1eeda \u0111i\u1ec7n \u0111\u00e3 b\u1ecb d\u00e3n n\u1edf \u0111\u1ed9t ng\u1ed9t khi\u1ebfn ch\u00fang dao \u0111\u1ed9ng g\u00e2y ra ti\u1ebfng s\u1ea5m","D. C\u1ea3 ba l\u00ed do tr\u00ean"],"hint":"","explain":"<span class='basic_left'>Khi tr\u1eddi m\u01b0a d\u00f4ng, xu\u1ea5t hi\u1ec7n tia s\u00e9t gi\u1eefa c\u00e1ch \u0111\u00e1m m\u00e2y v\u00e0 m\u1eb7t \u0111\u1ea5t, nhi\u1ec7t \u0111\u1ed9 tia s\u00e9t cao l\u00e0m h\u01a1i n\u01b0\u1edbc trong kh\u00f4ng kh\u00ed d\u00e3n n\u1edf \u0111\u1ed9t ng\u1ed9t khi\u1ebfn ch\u00fang dao \u0111\u1ed9ng g\u00e2y ra ti\u1ebfng s\u1ea5m.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2217},{"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":"Khi nh\u1ea1c s\u0129 ch\u01a1i \u0111\u00e0n ghita, ta nghe th\u1ea5y ti\u1ebfng nh\u1ea1c. V\u1eady \u0111\u00e2u l\u00e0 ngu\u1ed3n \u00e2m?","select":["A. Tay b\u1ea5m d\u00e2y \u0111\u00e0n.","B. D\u00e2y \u0111\u00e0n.","C. Tay g\u1ea3y d\u00e2y \u0111\u00e0n","D. H\u1ed9p \u0111\u00e0n."],"hint":"","explain":"<span class='basic_left'>D\u00e2y \u0111\u00e0n dao \u0111\u1ed9ng sinh ra \u00e2m.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2218},{"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":"Khi g\u00f5 tay xu\u1ed1ng m\u1eb7t b\u00e0n, ta nghe th\u1ea5y \u00e2m. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, v\u1eadt n\u00e0o \u0111\u00e3 dao \u0111\u1ed9ng ph\u00e1t ra \u00e2m?","select":["A. M\u1eb7t b\u00e0n dao \u0111\u1ed9ng ph\u00e1t ra \u00e2m","B. Tay ta g\u00f5 v\u00e0o b\u00e0n n\u00ean tay \u0111\u00e3 dao \u0111\u1ed9ng ph\u00e1t ra \u00e2m","C. C\u1ea3 tay ta v\u00e0 m\u1eb7t b\u00e0n \u0111\u1ec1u dao \u0111\u1ed9ng ph\u00e1t ra \u00e2m","D. L\u1edbp kh\u00f4ng kh\u00ed gi\u1eefa tay ta v\u00e0 m\u1eb7t b\u00e0n dao \u0111\u1ed9ng ph\u00e1t ra \u00e2m"],"hint":"","explain":"<span class='basic_left'>Khi g\u00f5 tay xu\u1ed1ng m\u1eb7t b\u00e0n, m\u1eb7t b\u00e0n dao \u0111\u1ed9ng ph\u00e1t ra \u00e2m.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2219},{"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":"H\u1ed9p \u0111\u00e0n trong c\u00e1c \u0111\u00e0n ghita, vi\u00f4l\u00f4ng, m\u0103ng\u0111\u00f4lin, vi\u00f4l\u00f4ng sen\u2026 c\u00f3 t\u00e1c d\u1ee5ng g\u00ec l\u00e0 ch\u1ee7 y\u1ebfu?","select":["A. \u0110\u1ec3 t\u1ea1o ki\u1ec3u d\u00e1ng cho \u0111\u00e0n.","B. \u0110\u1ec3 khu\u1ebfch \u0111\u1ea1i \u00e2m do d\u00e2y \u0111\u00e0n ph\u00e1t ra.","C. \u0110\u1ec3 ng\u01b0\u1eddi nh\u1ea1c s\u0129 c\u00f3 ch\u1ed7 t\u00ec khi \u0111\u00e1nh \u0111\u00e0n.","D. \u0110\u1ec3 ng\u01b0\u1eddi nh\u1ea1c s\u0129 c\u00f3 th\u1ec3 v\u1ed7 v\u00e0o h\u1ed9p \u0111\u00e0n khi c\u1ea7n thi\u1ebft."],"hint":"","explain":"<span class='basic_left'>H\u1ed9p \u0111\u00e0n trong c\u00e1c \u0111\u00e0n ghita, vi\u00f4l\u00f4ng, m\u0103ng\u0111\u00f4lin, vi\u00f4l\u00f4ng sen\u2026 c\u00f3 t\u00e1c d\u1ee5ng khu\u1ebfch \u0111\u1ea1i \u00e2m do d\u00e2y \u0111\u00e0n ph\u00e1t ra l\u00e0 ch\u1ee7 y\u1ebfu.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2220},{"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":"Ch\u1ecdn c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: Ngu\u1ed3n \u00e2m l\u00e0 g\u00ec?","select":["A. L\u00e0 nh\u1eefng v\u1eadt l\u00e0m cho v\u1eadt kh\u00e1c ph\u00e1t ra \u00e2m thanh","B. L\u00e0 nh\u1eefng \u00e2m thanh ph\u00e1t ra t\u1eeb \u00e2m thoa","C. L\u00e0 nh\u1eefng v\u1eadt ph\u00e1t ra \u00e2m thanh","D. C\u1ea3 3 c\u00e2u tr\u00ean \u0111\u1ec1u \u0111\u00fang"],"hint":"","explain":"<span class='basic_left'>Ngu\u1ed3n \u00e2m l\u00e0 nh\u1eefng v\u1eadt ph\u00e1t ra \u00e2m thanh.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2221},{"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":"Trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p d\u01b0\u1edbi \u0111\u00e2y, v\u1eadt ph\u00e1t ra \u00e2m thanh khi n\u00e0o?","select":["A. Khi k\u00e9o c\u0103ng v\u1eadt","B. Khi l\u00e0m v\u1eadt dao \u0111\u1ed9ng","C. Khi l\u00e0m v\u1eadt d\u00e3n n\u1edf","D. Khi l\u00e0m v\u1eadt bi\u1ebfn d\u1ea1ng"],"hint":"","explain":"<span class='basic_left'>Khi l\u00e0m v\u1eadt dao \u0111\u1ed9ng th\u00ec v\u1eadt ph\u00e1t ra \u00e2m thanh.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2222},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"H\u00e3y ch\u1ecdn \u0111\u00e1n \u00e1n sai:","select":["A. Ngu\u1ed3n \u00e2m l\u00e0 v\u1eadt ph\u00e1t ra \u00e2m","B. Dao \u0111\u1ed9ng l\u00e0 s\u1ef1 rung \u0111\u1ed9ng qua l\u1ea1i v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng","C. M\u1ecdi v\u1eadt dao \u0111\u1ed9ng \u0111\u1ec1u ph\u00e1t ra \u00e2m","D. Khi ph\u00e1t ra \u00e2m c\u00e1c v\u1eadt \u0111\u1ec1u dao \u0111\u1ed9ng"],"hint":"","explain":"<span class='basic_left'>Khi ph\u00e1t ra \u00e2m c\u00e1c v\u1eadt \u0111\u1ec1u dao \u0111\u1ed9ng, nh\u01b0ng kh\u00f4ng ph\u1ea3i v\u1eadt n\u00e0o dao \u0111\u1ed9ng c\u0169ng ph\u00e1t ra \u00e2m thanh => c\u00e2u sai l\u00e0 C.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2223},{"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 b\u1ea1n T\u00edn n\u00f3i th\u1ea7m v\u00e0 tai b\u1ea1n Na, b\u1ed9 ph\u1eadn n\u00e0o dao \u0111\u1ed9ng ph\u00e1t ra \u00e2m?","select":["A. M\u00e0ng nh\u0129 c\u1ee7a b\u1ea1n Na","B. Kh\u00ed qu\u1ea3n c\u1ee7a b\u1ea1n T\u00edn","C. L\u1edbp kh\u00f4ng kh\u00ed gi\u1eefa hai b\u1ea1n","D. D\u00e2y thanh qu\u1ea3n c\u1ee7a b\u1ea1n T\u00edn"],"hint":"","explain":"<span class='basic_left'>D\u00e2y thanh qu\u1ea3n c\u1ee7a b\u1ea1n T\u00edn dao \u0111\u1ed9ng t\u1ea1o ra \u00e2m.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2224},{"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":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/vatly/bai10/lv2/img\/h0.jpg'\/><\/center>\u0110\u1ed5 nh\u1eefng l\u01b0\u1ee3ng n\u01b0\u1edbc kh\u00e1c nhau v\u00e0o b\u1ea3y c\u00e1i chai gi\u1ed1ng nh\u01b0 nh\u01b0 h\u00ecnh:<br\/>D\u00f9ng th\u00eca g\u00f5 nh\u1eb9 v\u00e0o th\u00e0nh c\u00e1c chai v\u00e0 cho bi\u1ebft v\u1eadt n\u00e0o dao \u0111\u1ed9ng ph\u00e1t ra \u00e2m?","select":["A. Chai v\u00e0 n\u01b0\u1edbc trong chai \u0111\u1ed9ng ph\u00e1t ra \u00e2m","B. Ch\u1ec9 c\u00f3 chai trong chai \u0111\u1ed9ng ph\u00e1t ra \u00e2m","C. Ch\u1ec9 c\u00f3 n\u01b0\u1edbc trong chai \u0111\u1ed9ng ph\u00e1t ra \u00e2m","D. Kh\u00f4ng c\u00f3 v\u1eadt n\u00e0o ph\u00e1t ra \u00e2m"],"hint":"","explain":"<span class='basic_left'>Chai v\u00e0 n\u01b0\u1edbc trong chai \u0111\u1ed9ng ph\u00e1t ra \u00e2m thanh.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2225},{"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":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/vatly/bai10/lv2/img\/h0.jpg'\/><\/center>\u0110\u1ed5 nh\u1eefng l\u01b0\u1ee3ng n\u01b0\u1edbc kh\u00e1c nhau v\u00e0o b\u1ea3y c\u00e1i chai gi\u1ed1ng nh\u01b0 nh\u01b0 h\u00ecnh:<br\/>Th\u1ed5i m\u1ea1nh v\u00e0o mi\u1ec7ng c\u00e1c chai v\u00e0 cho bi\u1ebft v\u1eadt n\u00e0o dao \u0111\u1ed9ng ph\u00e1t ra \u00e2m?","select":["A. C\u1ed9t kh\u00f4ng kh\u00ed trong chai dao \u0111\u1ed9ng \u0111\u00e3 ph\u00e1t ra \u00e2m","B. Chai v\u00e0 n\u01b0\u1edbc trong chai \u0111\u1ed9ng ph\u00e1t ra \u00e2m","C. Ch\u1ec9 c\u00f3 chai trong chai \u0111\u1ed9ng ph\u00e1t ra \u00e2m","D. Ch\u1ec9 c\u00f3 n\u01b0\u1edbc trong chai \u0111\u1ed9ng ph\u00e1t ra \u00e2m"],"hint":"","explain":"<span class='basic_left'>Th\u1ed5i m\u1ea1nh v\u00e0o mi\u1ec7ng c\u00e1c chai, c\u1ed9t kh\u00f4ng kh\u00ed trong chai dao \u0111\u1ed9ng \u0111\u00e3 ph\u00e1t ra \u00e2m.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2226},{"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":"Trong b\u00e0i h\u00e1t \u201cNh\u1ea1c r\u1eebng\u201d c\u1ee7a nh\u1ea1c s\u0129 Ho\u00e0ng Vi\u1ec7t c\u00f3 vi\u1ebft: \u201cR\u00f3c r\u00e1ch, r\u00f3c r\u00e1ch n\u01b0\u1edbc lu\u1ed3n qua kh\u00f3m tr\u00fac\u201d. \u00c2m thanh \u0111\u01b0\u1ee3c ph\u00e1t ra t\u1eeb: ","select":["A. D\u00f2ng n\u01b0\u1edbc dao \u0111\u1ed9ng.","B. L\u00e1 c\u00e2y dao \u0111\u1ed9ng. ","C. D\u00f2ng n\u01b0\u1edbc v\u00e0 kh\u00f3m tr\u00fac. ","D. Do l\u1edbp kh\u00f4ng kh\u00ed \u1edf tr\u00ean m\u1eb7t n\u01b0\u1edbc."],"hint":"","explain":"<span class='basic_left'>D\u00f2ng n\u01b0\u1edbc dao \u0111\u1ed9ng t\u1ea1o ra ti\u1ebfng r\u00f3c r\u00e1ch.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2227},{"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":"Khi lu\u1ed3ng gi\u00f3 th\u1ed5i qua r\u1eebng c\u00e2y ta nghe \u00e2m thanh ph\u00e1t ra. V\u1eadt ph\u00e1t ra \u00e2m thanh l\u00e0 :","select":["A. Lu\u1ed3ng gi\u00f3","B. L\u00e1 c\u00e2y","C. Lu\u1ed3ng gi\u00f3 v\u00e0 c\u00e1c l\u00e1 c\u00e2y","D. Th\u00e2n c\u00e2y"],"hint":"","explain":"<span class='basic_left'>Khi lu\u1ed3ng gi\u00f3 th\u1ed5i qua r\u1eebng c\u00e2y ta nghe \u00e2m thanh ph\u00e1t ra. V\u1eadt ph\u00e1t ra \u00e2m thanh l\u00e0 lu\u1ed3ng gi\u00f3 v\u00e0 c\u00e1c l\u00e1 c\u00e2y.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2228},{"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":"Khi ng\u01b0\u1eddi ta d\u00f9ng d\u00f9i g\u00f5 v\u00e0o c\u00e1c thanh \u0111\u00e1 thu\u1ed9c b\u1ed9 ph\u1eadn \u0111\u00e0n \u0111\u00e1, ng\u01b0\u1eddi ta nghe th\u1ea5y \u00e2m thanh ph\u00e1t ra. V\u1eadt ph\u00e1t ra \u00e2m thanh l\u00e0 : ","select":["A. D\u00f9i g\u00f5","B. C\u00e1c thanh \u0111\u00e1.","C. D\u00f9i g\u00f5 v\u00e0 c\u00e1c thanh \u0111\u00e1.","D. Do l\u1edbp kh\u00f4ng kh\u00ed xung quanh"],"hint":"","explain":"<span class='basic_left'>C\u00e1c thanh \u0111\u00e1 dao \u0111\u1ed9ng ph\u00e1t ra \u00e2m thanh.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2229},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Nh\u1eadn x\u00e9t n\u00e0o sau \u0111\u00e2y l\u00e0 sai:","select":["A. Dao \u0111\u1ed9ng l\u00e0 chuy\u1ec3n \u0111\u1ed9ng qua l\u1ea1i quanh v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng","B. Khi ph\u00e1t ra \u00e2m c\u00e1c v\u1eadt \u0111\u1ec1u dao \u0111\u1ed9ng","C. S\u1ef1 rung \u0111\u1ed9ng c\u1ee7a d\u00e2y cao su g\u1ecdi l\u00e0 s\u1ef1 dao \u0111\u1ed9ng","D. Ti\u1ebfng s\u1ea5m ph\u00e1t ra \u00e2m nh\u01b0ng kh\u00f4ng dao \u0111\u1ed9ng"],"hint":"","explain":"<span class='basic_left'>Ti\u1ebfng s\u1ea5m \u0111\u01b0\u1ee3c sinh ra do khi c\u00f3 s\u00e9t l\u00e0m h\u01a1i n\u01b0\u1edbc trong kh\u00f4ng kh\u00ed d\u00e3n n\u1edf \u0111\u1ed9t ng\u1ed9t.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2230}],"lesson":{"save":0,"level":2}}