{"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":"Khi l\u00e0m th\u00ed nghi\u1ec7m v\u1edbi hi\u1ec7u \u0111i\u1ec7n th\u1ebf d\u01b0\u1edbi 40V th\u00ec:","select":["A. D\u00f2ng \u0111i\u1ec7n kh\u00f4ng khi n\u00e0o \u0111i qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi.","B. D\u00f2ng \u0111i\u1ec7n c\u00f3 th\u1ec3 \u0111i qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi nh\u01b0ng kh\u00f4ng g\u00e2y nguy hi\u1ec3m.","C. D\u00f2ng \u0111i\u1ec7n c\u00f3 th\u1ec3 \u0111i qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi v\u00e0 g\u00e2y nguy hi\u1ec3m.","D. T\u1ea5t c\u1ea3 \u0111\u1ec1u sai."],"hint":"","explain":"<span class='basic_left'>Khi l\u00e0m th\u00ed nghi\u1ec7m v\u1edbi hi\u1ec7u \u0111i\u1ec7n th\u1ebf d\u01b0\u1edbi 40V th\u00ec d\u00f2ng \u0111i\u1ec7n c\u00f3 th\u1ec3 \u0111i qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi nh\u01b0ng kh\u00f4ng g\u00e2y nguy hi\u1ec3m.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2551},{"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/lop7/vatly/bai29/lv2/img\/h0.jpg'\/><\/center>V\u1edbi c\u00e1c m\u1ee9c c\u01b0\u1eddng \u0111\u1ed9 \u0111i\u1ec7n tr\u00ean \u0111\u00e2y, ch\u1ecdn \u1ea3nh h\u01b0\u1edfng c\u1ee7a n\u00f3 l\u00ean c\u01a1 th\u1ec3 ng\u01b0\u1eddi: ","select":["A. 1-a, 2-b, 3-c","B. 1-b, 2-c, 3-a","C. 1-a, 2-a, 3-c","D. 1-c, 2-a, 2-c"],"hint":"","explain":"<span class='basic_left'>C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n tr\u00ean 10mA g\u00e2y co gi\u1eadt c\u00e1c c\u01a1.<br\/>C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n tr\u00ean 25mA l\u00e0m t\u1ed5n th\u01b0\u01a1ng tim.<br\/>C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n tr\u00ean 70mA l\u00e0m tim ng\u1eebng \u0111\u1eadp.<br\/><span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2552},{"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 \u0111o\u1ea3n m\u1ea1ch x\u1ea3y ra khi :","select":["A. M\u1ea1ch \u0111i\u1ec7n c\u00f3 d\u00e2y d\u1eabn ng\u1eafn.","B. M\u1ea1ch \u0111i\u1ec7n d\u00f9ng pin hay acquy \u0111\u1ec3 th\u1eafp s\u00e1ng \u0111\u00e8n.","C. M\u1ea1ch \u0111i\u1ec7n kh\u00f4ng c\u00f3 c\u1ea7u ch\u00ec.","D. M\u1ea1ch \u0111i\u1ec7n b\u1ecb n\u1ed1i t\u1eaft b\u1eb1ng d\u00e2y \u0111\u1ed3ng gi\u1eefa hai c\u1ef1c c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n."],"hint":"","explain":"<span class='basic_left'>Hi\u1ec7n t\u01b0\u1ee3ng \u0111o\u1ea3n m\u1ea1ch x\u1ea3y ra khi m\u1ea1ch \u0111i\u1ec7n b\u1ecb n\u1ed1i t\u1eaft b\u1eb1ng d\u00e2y \u0111\u1ed3ng gi\u1eefa hai c\u1ef1c c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n. Khi \u0111\u00f3 d\u00f2ng \u0111i\u1ec7n s\u1ebd t\u0103ng cao v\u00e0 g\u00e2y ch\u00e1y c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2553},{"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":"Nh\u1eefng vi\u1ec7c l\u00e0m n\u00e0o d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ea3m b\u1ea3o an to\u00e0n \u0111\u1ed1i v\u1edbi h\u1ecdc sinh khi s\u1eed d\u1ee5ng \u0111i\u1ec7n ?","select":["A. Ph\u01a1i qu\u1ea7n \u00e1o l\u00ean d\u00e2y \u0111i\u1ec7n.","B. L\u00e0m th\u00ed nghi\u1ec7m v\u1edbi d\u00e2y d\u1eabn c\u00f3 v\u1ecf b\u1ecdc c\u00e1ch \u0111i\u1ec7n.","C. T\u1ef1 m\u00ecnh s\u1eeda ch\u1eefa m\u1ea1ng \u0111i\u1ec7n gia \u0111\u00ecnh.","D. Ch\u01a1i th\u1ea3 di\u1ec1u g\u1ea7n \u0111\u01b0\u1eddng d\u00e2y t\u1ea3i \u0111i\u1ec7n."],"hint":"","explain":"<span class='basic_left'>Nh\u1eefng vi\u1ec7c l\u00e0m \u0111\u1ea3m b\u1ea3o an to\u00e0n \u0111\u1ed1i v\u1edbi h\u1ecdc sinh khi s\u1eed d\u1ee5ng \u0111i\u1ec7n l\u00e0 l\u00e0m th\u00ed nghi\u1ec7m v\u1edbi d\u00e2y d\u1eabn c\u00f3 v\u1ecf b\u1ecdc c\u00e1ch \u0111i\u1ec7n. C\u00f2n l\u1ea1i kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p l\u00e0m c\u00e1c vi\u1ec7c nguy hi\u1ec3m nh\u01b0 l\u1ea1i g\u1ea7n ho\u1eb7c ch\u01a1i \u0111\u00f9a g\u1ea7n \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2554},{"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":"D\u00f2ng \u0111i\u1ec7n \u0111i qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi c\u00f3 th\u1ec3 g\u00e2y ra t\u00e1c d\u1ee5ng n\u00e0o d\u01b0\u1edbi \u0111\u00e2y ?","select":["A. Ch\u1ec9 t\u00e1c d\u1ee5ng l\u00ean h\u1ec7 th\u1ea7n kinh l\u00e0m c\u01a1 th\u1ec3 b\u1ecb t\u00ea li\u1ec7t.","B. Ch\u1ec9 t\u00e1c d\u1ee5ng l\u00ean h\u1ec7 c\u01a1 th\u1ec3 l\u00e0m c\u01a1 th\u1ec3 b\u1ecb co r\u00fat, l\u00e0m tim ng\u1eebng \u0111\u1eadp.","C. Ch\u1ec9 t\u00e1c d\u1ee5ng l\u00ean h\u1ec7 h\u00f4 h\u1ea5p l\u00e0m ng\u1eebng th\u1edf","D. C\u1ea3 ba t\u00e1c d\u1ee5ng tr\u00ean \u0111\u00e2y."],"hint":"","explain":"<span class='basic_left'>D\u00f2ng \u0111i\u1ec7n \u0111i qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi c\u00f3 th\u1ec3 g\u00e2y ra t\u00e1c d\u1ee5ng l\u00ean h\u1ec7 th\u1ea7n kinh l\u00e0m c\u01a1 th\u1ec3 b\u1ecb t\u00ea li\u1ec7t, t\u00e1c d\u1ee5ng l\u00ean h\u1ec7 c\u01a1 th\u1ec3 l\u00e0m c\u01a1 th\u1ec3 b\u1ecb co r\u00fat, l\u00e0m tim ng\u1eebng \u0111\u1eadp, t\u00e1c d\u1ee5ng l\u00ean h\u1ec7 h\u00f4 h\u1ea5p l\u00e0m ng\u1eebng th\u1edf.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2555},{"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":"C\u00f4ng vi\u1ec7c n\u00e0o d\u01b0\u1edbi \u0111\u00e2y kh\u00f4ng \u0111\u1ea3m b\u1ea3o an to\u00e0n khi s\u1eed d\u1ee5ng \u0111i\u1ec7n ?","select":["A. S\u1eed d\u1ee5ng c\u00e1c ngu\u1ed3n \u0111i\u1ec7n c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf d\u01b0\u1edbi 40V \u0111\u1ec3 l\u00e0m th\u00ed nghi\u1ec7m.","B. T\u1ef1 s\u1eeda ch\u1eefa c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n \u0111\u01b0\u1ee3c d\u00f9ng v\u1edbi m\u1ea1ng \u0111i\u1ec7n d\u00e2n d\u1ee5ng.","C. S\u1eed d\u1ee5ng c\u00e1c d\u00e2y d\u1eabn, c\u00e1c d\u1ee5ng c\u1ee5 s\u1eeda ch\u1eefa \u0111i\u1ec7n c\u00f3 v\u1ecf b\u1ecdc c\u00e1ch \u0111i\u1ec7n v\u00e0 s\u1eed d\u1ee5ng c\u00e1c v\u1eadt l\u00f3t c\u00e1ch \u0111i\u1ec7n.","D. Tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng \u0111\u1ec3 d\u00f2ng \u0111i\u1ec7n c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 tr\u00ean 70mA \u0111i qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi."],"hint":"","explain":"<span class='basic_left'>T\u1ef1 s\u1eeda ch\u1eefa c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n \u0111\u01b0\u1ee3c d\u00f9ng v\u1edbi m\u1ea1ng \u0111i\u1ec7n d\u00e2n d\u1ee5ng kh\u00f4ng \u0111\u1ea3m b\u1ea3o an to\u00e0n khi s\u1eed d\u1ee5ng \u0111i\u1ec7n, tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng \u0111\u01b0\u1ee3c l\u00e0m.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2556},{"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":"Tr\u00ean m\u1ed9t c\u1ea7u ch\u00ec c\u00f3 ghi 1A. Con s\u1ed1 n\u00e0y c\u00f3 \u00fd ngh\u0129a g\u00ec ?","select":["A. C\u00f3 \u00fd ngh\u0129a l\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n \u0111i qua c\u1ea7u ch\u00ec n\u00e0y t\u1eeb 1A tr\u1edf l\u00ean th\u00ec c\u1ea7u ch\u00ec s\u1ebd \u0111\u1ee9t.","B. C\u00f3 \u00fd ngh\u0129a l\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n \u0111i qua c\u1ea7u ch\u00ec lu\u00f4n l\u1edbn h\u01a1n 1A.","C. C\u00f3 ngh\u0129a l\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n \u0111i qua c\u1ea7u ch\u00ec lu\u00f4n b\u1eb1ng 1A.","D. C\u00f3 ngh\u0129a l\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n \u0111i qua c\u1ea7u ch\u00ec lu\u00f4n nh\u1ecf h\u01a1n 1A."],"hint":"","explain":"<span class='basic_left'>Tr\u00ean m\u1ed9t c\u1ea7u ch\u00ec c\u00f3 ghi 1A. Con s\u1ed1 n\u00e0y c\u00f3 \u00fd ngh\u0129a l\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n \u0111i qua c\u1ea7u ch\u00ec n\u00e0y t\u1eeb 1A tr\u1edf l\u00ean th\u00ec c\u1ea7u ch\u00ec s\u1ebd \u0111\u1ee9t. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2557},{"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\u1ea7n ph\u1ea3i ch\u00fa \u00fd \u0111i\u1ec1u n\u00e0o d\u01b0\u1edbi \u0111\u00e2y khi s\u1eed d\u1ee5ng c\u1ea7u ch\u00ec ?","select":["A. Ph\u1ea3i m\u1eafc th\u1eadt g\u1ea7n d\u1ee5ng c\u1ee5 hay thi\u1ebft b\u1ecb m\u00e0 n\u00f3 c\u1ea7n b\u1ea3o v\u1ec7.","B. Lu\u00f4n ch\u1ecdn d\u00e2y ch\u00ec th\u1eadt m\u1ea3nh (nh\u1ecf) \u0111\u1ec3 n\u00f3 d\u1ec5 n\u00f3ng ch\u1ea3y.","C. Lu\u00f4n ch\u1ecdn d\u00e2y ch\u00ec l\u1edbn ( to) \u0111\u1ec3 c\u1ea7u ch\u00ec b\u1ec1n ch\u1eafc.","D. Lu\u00f4n ch\u1ecdn d\u00e2y ch\u00ec ph\u00f9 h\u1ee3p \u0111\u1ed1i v\u1edbi m\u1ed7i thi\u1ebft b\u1ecb hay d\u1ee5ng c\u1ee5 \u0111i\u1ec7n m\u00e0 n\u00f3 c\u1ea7n b\u1ea3o v\u1ec7."],"hint":"","explain":"<span class='basic_left'>C\u1ea7n ph\u1ea3i lu\u00f4n ch\u1ecdn d\u00e2y ch\u00ec ph\u00f9 h\u1ee3p \u0111\u1ed1i v\u1edbi m\u1ed7i thi\u1ebft b\u1ecb hay d\u1ee5ng c\u1ee5 \u0111i\u1ec7n m\u00e0 n\u00f3 c\u1ea7n b\u1ea3o v\u1ec7.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2558},{"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":"C\u00e1ch l\u00e0m n\u00e0o d\u01b0\u1edbi \u0111\u00e2y kh\u00f4ng \u0111\u1ea3m b\u1ea3o an to\u00e0n khi s\u1eed d\u1ee5ng \u0111i\u1ec7n ?","select":["A. M\u1eafc c\u1ea7u ch\u00ec ph\u00f9 h\u1ee3p v\u1edbi d\u1ee5ng c\u1ee5 hay thi\u1ebft b\u1ecb s\u1eed d\u1ee5ng \u0111i\u1ec7n.","B. Ng\u1eaft c\u00f4ng t\u1eafc hay c\u1ea7u dao \u0111i\u1ec7n khi c\u00f3 s\u1ef1i c\u1ed1 v\u1ec1 \u0111i\u1ec7n.","C. Ph\u01a1i qu\u1ea7n \u00e1o tr\u00ean d\u00e2y \u0111i\u1ec7n.","D. L\u00e0m th\u00ed nghi\u1ec7m v\u1edbi c\u00e1c ngu\u1ed3n \u0111i\u1ec7n c\u00f3 hi\u1ec7u \u0111i\u1ec7n th\u1ebf d\u01b0\u1edbi 40V."],"hint":"","explain":"<span class='basic_left'>Ph\u01a1i qu\u1ea7n \u00e1o tr\u00ean d\u00e2y \u0111i\u1ec7n kh\u00f4ng \u0111\u1ea3m b\u1ea3o an to\u00e0n khi s\u1eed d\u1ee5ng \u0111i\u1ec7n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2559},{"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\u00ec l\u00ed do n\u00e0o d\u01b0\u1edbi \u0111\u00e2y m\u00e0 c\u00e1c d\u1ee5ng c\u1ee5 \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 s\u1eeda ch\u1eefa \u0111i\u1ec7n nh\u01b0 k\u00ecm, tuavit\u2026\u0111\u1ec1u c\u00f3 c\u00e1n \u0111\u01b0\u1ee3c b\u1ecdc nh\u1ef1a hay cao su ?","select":["A. Cao su, nh\u1ef1a l\u00e0m cho tay c\u1ea7m kh\u00f4ng b\u1ecb n\u00f3ng.","B. Cao su, nh\u1ef1a \u0111\u1ec1u l\u00e0 ch\u1ea5t c\u00e1ch \u0111i\u1ec7n n\u00ean tr\u00e1nh kh\u00f4ng cho d\u00f2ng \u0111i\u1ec7n truy\u1ec1n v\u00e0o c\u01a1 th\u1ec3 ng\u01b0\u1eddi.","C. Cao su, nh\u1ef1a l\u00e0m cho tay ta kh\u00f4ng b\u1ecb d\u00f2ng \u0111i\u1ec7n h\u00fat v\u00e0o.","D. Vao su, nh\u1ef1a gi\u00fap cho tay ta c\u1ea7m c\u00e1c d\u1ee5ng c\u1ee5 n\u00e0y ch\u1eafc h\u01a1n, kh\u00f4ng b\u1ecb tu\u1ed9t."],"hint":"","explain":"<span class='basic_left'>V\u00ec cao su, nh\u1ef1a \u0111\u1ec1u l\u00e0 ch\u1ea5t c\u00e1ch \u0111i\u1ec7n n\u00ean tr\u00e1nh kh\u00f4ng cho d\u00f2ng \u0111i\u1ec7n truy\u1ec1n v\u00e0o c\u01a1 th\u1ec3 ng\u01b0\u1eddi.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2560},{"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/bai29/lv2/img\/h1.jpg'\/><\/center>Gh\u00e9p m\u1ed7i \u0111o\u1ea1n c\u00e2u \u1edf c\u1ed9t b\u00ean tr\u00e1i v\u1edbi m\u1ed9t \u0111o\u1ea1n c\u00e2u \u1edf c\u1ed9t b\u00ean ph\u1ea3i \u0111\u1ec3 th\u00e0nh m\u1ed9t c\u00e2u ho\u00e0n ch\u1ec9nh c\u00f3 n\u1ed9i dung \u0111\u00fang.","select":["A. 1.c 2.d 3.e 4.b","B. 1.c 2.e 3.d 4.b","C. 1.c 2.b 3.e 4.d","D. 1.e 2.d 3.c 4.b"],"hint":"","explain":"<span class='basic_left'>1. D\u00f2ng \u0111i\u1ec7n c\u00f3 th\u1ec3 ch\u1ea1y qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi nh\u01b0ng kh\u00f4ng g\u00e2y nguy hi\u1ec3m khi l\u00e0m th\u00ed nghi\u1ec7m v\u1edbi hi\u1ec7u \u0111i\u1ec7n th\u1ebf d\u01b0\u1edbi 40V.<br\/>2. Hi\u1ec7n t\u01b0\u1ee3ng \u0111o\u1ea1n m\u1ea1ch x\u1ea3y ra khi n\u1ed1i tr\u1ef1c ti\u1ebfp hai c\u1ef1c c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n b\u1eb1ng \u0111o\u1ea1n d\u00e2y \u0111\u1ed3ng ng\u1eafn.<br\/>3. T\u1ea1o \u0111i\u1ec1u ki\u1ec7n \u0111\u1ec3 s\u1eed d\u1ee5ng \u0111i\u1ec7n an to\u00e0n khi l\u1eafp c\u1ea7u ch\u00ec ph\u00f9 h\u1ee3p cho m\u1ed7i thi\u1ebft b\u1ecb ho\u1eb7c d\u1ee5ng c\u1ee5 \u0111i\u1ec7n.<br\/>4. D\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi v\u00e0 l\u00e0m tim ng\u1eebng \u0111\u1eadp khi d\u00f2ng \u0111i\u1ec7n \u0111\u00f3 c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 tr\u00ean 70mA.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2561},{"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":"Gi\u1ea3i th\u00edch v\u00ec sao \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n khi s\u1eed d\u1ee5ng \u0111i\u1ec7n, ng\u01b0\u1eddi ta ph\u1ea3i m\u1eafc c\u1ea7u ch\u00ec th\u00edch h\u1ee3p cho m\u1ed7i thi\u1ebft b\u1ecb ho\u1eb7c d\u1ee5ng c\u1ee5 \u0111i\u1ec7n trong m\u1ea1ch.","select":["A. Ng\u01b0\u1eddi ta m\u1eafc c\u1ea7u ch\u00ec th\u00edch h\u1ee3p cho m\u1ed7i thi\u1ebft b\u1ecb ho\u1eb7c d\u1ee5ng c\u1ee5 \u0111i\u1ec7n trong m\u1ea1ch v\u00ec \u0111\u1ec3 khi d\u00f2ng \u0111i\u1ec7n c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 v\u01b0\u1ee3t qu\u00e1 \u0111\u1ecbnh m\u1ee9c c\u1ee7a thi\u1ebft b\u1ecb s\u1eed d\u1ee5ng th\u00ec c\u1ea7u ch\u00ec t\u1ef1 \u0111\u1ed9ng b\u1ecb \u0111\u1ee9t - m\u1ea1ch h\u1edf, kh\u00f4ng g\u00e2y nguy hi\u1ec3m cho c\u00e1c thi\u1ebft b\u1ecb","B. V\u00ec l\u00e0m th\u1ebf cho \u0111\u1eb9p","C. V\u00ec tr\u00e1nh g\u00e2y ch\u00e1y n\u1ed5 khi d\u00f2ng \u0111i\u1ec7n trong m\u1ea1ch \u1ed5n \u0111\u1ecbnh","D. V\u00ec tr\u00e1nh m\u00e0ng nh\u1ec7n"],"hint":"","explain":"<span class='basic_left'>Ng\u01b0\u1eddi ta m\u1eafc c\u1ea7u ch\u00ec th\u00edch h\u1ee3p cho m\u1ed7i thi\u1ebft b\u1ecb ho\u1eb7c d\u1ee5ng c\u1ee5 \u0111i\u1ec7n trong m\u1ea1ch v\u00ec \u0111\u1ec3 khi d\u00f2ng \u0111i\u1ec7n c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 v\u01b0\u1ee3t qu\u00e1 \u0111\u1ecbnh m\u1ee9c c\u1ee7a thi\u1ebft b\u1ecb s\u1eed d\u1ee5ng th\u00ec c\u1ea7u ch\u00ec t\u1ef1 \u0111\u1ed9ng b\u1ecb \u0111\u1ee9t - m\u1ea1ch h\u1edf, kh\u00f4ng g\u00e2y nguy hi\u1ec3m cho c\u00e1c thi\u1ebft b\u1ecb<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2562},{"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\u00ec sao kh\u00f4ng \u0111\u01b0\u1ee3c ph\u01a1i kh\u0103n m\u1eb7t hay qu\u1ea7n \u00e1o \u01b0\u1edbt l\u00ean d\u00e2y \u0111i\u1ec7n?","select":["A. B\u1edfi v\u00ec ph\u00f2ng khi \u0111i\u1ec7n h\u1edf, ph\u01a1i kh\u0103n m\u1eb7t \u01b0\u1edbt l\u00e0m \u0111\u1ee9t d\u00e2y","B. B\u1edfi v\u00ec ph\u00f2ng khi d\u00e2y \u0111i\u1ec7n b\u1ecb h\u1edf v\u00e0 truy\u1ec1n \u0111i\u1ec7n qua kh\u0103n \u01b0\u1edbt, qu\u1ea7n \u00e1o \u01b0\u1edbt \u0111\u1ebfn tay ng\u01b0\u1eddi g\u00e2y nguy hi\u1ec3m \u0111\u1ebfn c\u01a1 th\u1ec3 ng\u01b0\u1eddi","C. B\u1edfi v\u00ec qu\u1ea7n \u00e1o \u01b0\u1edbt l\u00e0m truy\u1ec1n \u0111i\u1ec7n","D. C\u1ea3 ba \u0111\u1ec1u sai"],"hint":"","explain":"<span class='basic_left'>Kh\u00f4ng \u0111\u01b0\u1ee3c ph\u01a1i kh\u0103n m\u1eb7t hay qu\u1ea7n \u00e1o \u01b0\u1edbt l\u00ean d\u00e2y \u0111i\u1ec7n b\u1edfi v\u00ec ph\u00f2ng khi d\u00e2y \u0111i\u1ec7n b\u1ecb h\u1edf v\u00e0 truy\u1ec1n \u0111i\u1ec7n qua kh\u0103n \u01b0\u1edbt, qu\u1ea7n \u00e1o \u01b0\u1edbt \u0111\u1ebfn tay ng\u01b0\u1eddi g\u00e2y nguy hi\u1ec3m \u0111\u1ebfn c\u01a1 th\u1ec3 ng\u01b0\u1eddi<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2563},{"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\u00ec sao khi th\u1ea5y m\u1ed9t ng\u01b0\u1eddi b\u1ecb \u0111i\u1ec7n gi\u1eadt th\u00ec kh\u00f4ng \u0111\u01b0\u1ee3c c\u1ea7m tay ng\u01b0\u1eddi \u0111\u00f3 \u0111\u1ec3 k\u00e9o ng\u01b0\u1eddi \u0111\u00f3 ra kh\u1ecfi d\u00e2y \u0111i\u1ec7n ?","select":["A. N\u1ebfu c\u1ea7m tay th\u00ec s\u1ebd b\u1ecb gi\u1eadt theo","B. V\u00ec n\u1ebfu c\u1ea7m tay s\u1ebd l\u00e2y b\u1ec7nh","C. B\u1edfi v\u00ec n\u1ebfu c\u1ea7m tay ng\u01b0\u1eddi \u0111\u00f3 th\u00ec c\u01a1 th\u1ec3 ta c\u0169ng b\u1ecb \u0111i\u1ec7n gi\u1eadt v\u00e0 b\u1ecb h\u00fat ch\u1eb7t v\u00e0o ng\u01b0\u1eddi \u0111\u00f3 do d\u1eabn \u0111i\u1ec7n","D. C\u1ea3 3 \u0111\u1ec1u sai"],"hint":"","explain":"<span class='basic_left'>Khi th\u1ea5y m\u1ed9t ng\u01b0\u1eddi b\u1ecb \u0111i\u1ec7n gi\u1eadt th\u00ec kh\u00f4ng \u0111\u01b0\u1ee3c c\u1ea7m tay ng\u01b0\u1eddi \u0111\u00f3 \u0111\u1ec3 k\u00e9o ng\u01b0\u1eddi \u0111\u00f3 ra kh\u1ecfi d\u00e2y \u0111i\u1ec7n, m\u00e0 ph\u1ea3i t\u00ecm c\u00e1ch ng\u1eaft ngay ngu\u1ed3n \u0111i\u1ec7n ho\u1eb7c d\u00f9ng v\u1eadt kh\u00f4 kh\u00f4ng d\u1eabn \u0111i\u1ec7n (v\u00ed d\u1ee5: ch\u1ed5i, thanh tre,...) \u0111\u1ec3 \u0111\u1ea9y v\u1eadt d\u1eabn \u0111i\u1ec7n ra kh\u1ecfi n\u1ea1n nh\u00e2n, r\u1ed3i sau \u0111\u00f3 m\u1edbi \u0111\u01b0\u1ee3c ti\u1ebfp x\u00fac v\u1edbi n\u1ea1n nh\u00e2n. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2564},{"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":"Tai n\u1ea1n \u0111i\u1ec7n th\u01b0\u1eddng do nguy\u00ean nh\u00e2n n\u00e0o?","select":["A. Do ch\u1ea1m tr\u1ef1c ti\u1ebfp v\u00e0o v\u1eadt mang \u0111i\u1ec7n","B. S\u1eed d\u1ee5ng \u0111\u1ed3 d\u00f9ng \u0111i\u1ec7n r\u00f2 ra v\u1ecf","C. S\u1eeda ch\u1eefa \u0111i\u1ec7n kh\u00f4ng ng\u1eaft ngu\u1ed3n \u0111i\u1ec7n","D. C\u1ea3 A, B, C \u0111\u00fang"],"hint":"","explain":"<span class='basic_left'>Tai n\u1ea1n \u0111i\u1ec7n th\u01b0\u1eddng do nguy\u00ean nh\u00e2n: <br\/>Do ch\u1ea1m tr\u1ef1c ti\u1ebfp v\u00e0o v\u1eadt mang \u0111i\u1ec7n.<br\/>S\u1eed d\u1ee5ng \u0111\u1ed3 d\u00f9ng \u0111i\u1ec7n r\u00f2 ra v\u1ecf. <br\/>S\u1eeda ch\u1eefa \u0111i\u1ec7n kh\u00f4ng ng\u1eaft ngu\u1ed3n \u0111i\u1ec7n. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2565},{"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 nh\u1eefng h\u00e0nh \u0111\u1ed9ng \u0111\u00fang v\u1ec1 an to\u00e0n \u0111i\u1ec7n trong nh\u1eefng h\u00e0nh \u0111\u1ed9ng d\u01b0\u1edbi \u0111\u00e2y?","select":["A. Ch\u01a1i \u0111\u00f9a v\u00e0 tr\u00e8o l\u00ean c\u1ed9t \u0111i\u1ec7n cao \u00e1p","B. Th\u1ea3 di\u1ec1u g\u1ea7n \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n","C. Kh\u00f4ng bu\u1ed9c tr\u00e2u b\u00f2 v\u00e0o c\u1ed9t \u0111i\u1ec7n cao \u00e1p","D. T\u1eafm m\u01b0a g\u1ea7n \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n cao \u00e1p"],"hint":"","explain":"<span class='basic_left'>Tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng \u0111\u01b0\u1ee3c ti\u1ebfp x\u00fac, l\u1ea1i g\u1ea7n v\u00e0 vui ch\u01a1i g\u1ea7n \u0111\u01b0\u1eddng d\u00e2y cao \u00e1p, \u0111\u1eb7c bi\u1ebft l\u00e0 khi tr\u1eddi m\u01b0a, v\u00ec r\u1ea5t nguy hi\u1ec3m. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2566},{"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 s\u1eed d\u1ee5ng v\u00e0 s\u1eeda ch\u1eefa \u0111i\u1ec7n c\u1ea7n s\u1eed d\u1ee5ng nh\u1eefng nguy\u00ean t\u1eafc an to\u00e0n g\u00ec?","select":["A. Ki\u1ec3m tra c\u00e1ch \u0111i\u1ec7n c\u1ee7a \u0111\u1ed3 d\u00f9ng \u0111i\u1ec7n.","B. Tr\u01b0\u1edbc khi s\u1eeda ch\u1eefa \u0111i\u1ec7n ph\u1ea3i c\u1eaft ngu\u1ed3n \u0111i\u1ec7n.","C. S\u1eed d\u1ee5ng \u0111\u00fang c\u00e1c d\u1ee5ng c\u1ee5 b\u1ea3o v\u1ec7 an to\u00e0n \u0111i\u1ec7n.","D. T\u1ea5t c\u1ea3 \u0111\u1ec1u \u0111\u00fang."],"hint":"","explain":"<span class='basic_left'>Khi s\u1eed d\u1ee5ng v\u00e0 s\u1eeda ch\u1eefa \u0111i\u1ec7n c\u1ea7n s\u1eed d\u1ee5ng nh\u1eefng nguy\u00ean t\u1eafc an to\u00e0n:<br\/>Ki\u1ec3m tra c\u00e1ch \u0111i\u1ec7n c\u1ee7a \u0111\u1ed3 d\u00f9ng \u0111i\u1ec7n.<br\/>Tr\u01b0\u1edbc khi s\u1eeda ch\u1eefa \u0111i\u1ec7n ph\u1ea3i c\u1eaft ngu\u1ed3n \u0111i\u1ec7n. <br\/>S\u1eed d\u1ee5ng \u0111\u00fang c\u00e1c d\u1ee5ng c\u1ee5 b\u1ea3o v\u1ec7 an to\u00e0n \u0111i\u1ec7n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2567},{"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":"Tr\u01b0\u1edbc khi s\u1eeda ch\u1eefa \u0111i\u1ec7n, ph\u1ea3i c\u1eaft ngu\u1ed3n \u0111i\u1ec7n theo tr\u00ecnh t\u1ef1 n\u00e0o?","select":["A. C\u1eaft c\u1ea7u dao -> R\u00fat c\u1ea7u ch\u00ec -> R\u00fat ph\u00edch c\u1eafm \u0111i\u1ec7n","B. R\u00fat ph\u00edch c\u1eafm \u0111i\u1ec7n -> R\u00fat c\u1ea7u ch\u00ec -> Ng\u1eaft c\u1ea7u dao","C. C\u1eaft c\u1ea7u dao -> R\u00fat ph\u00edch c\u1eafm \u0111i\u1ec7n -> R\u00fat c\u1ea7u ch\u00ec","D. \u0110\u00e1p \u00e1n A, B, C"],"hint":"","explain":"<span class='basic_left'>Tr\u01b0\u1edbc khi s\u1eeda ch\u1eefa \u0111i\u1ec7n, ph\u1ea3i c\u1eaft ngu\u1ed3n \u0111i\u1ec7n theo tr\u00ecnh t\u1ef1 theo m\u1ed9t trong ba c\u00e1ch tr\u00ean \u0111\u1ec1u \u0111\u01b0\u1ee3c nh\u01b0ng ph\u1ea3i \u0111\u1ee7 c\u00e1c b\u01b0\u1edbc.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2568},{"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":"Th\u1ebf n\u00e0o l\u00e0 ph\u1ea1m vi kho\u1ea3ng c\u00e1ch an to\u00e0n \u0111i\u1ec7n \u0111\u1ed1i v\u1edbi l\u01b0\u1edbi \u0111i\u1ec7n cao \u00e1p v\u00e0 tr\u1ea1m bi\u1ebfn \u00e1p?","select":["A. L\u00e0 kho\u1ea3ng c\u00e1ch b\u1ea5t k\u1ef3 mi\u1ec5n c\u00e1ch xa \u0111\u01b0\u1eddng cao \u00e1p v\u00e0 tr\u1ea1m bi\u1ebfn \u00e1p.","B. L\u00e0 kho\u1ea3ng c\u00e1ch \u0111\u1ea3m b\u1ea3o \u0111\u1ee7 an to\u00e0n v\u1edbi \u0111\u01b0\u1eddng truy\u1ec1n t\u1ea3i \u0111i\u1ec7n n\u0103ng, tr\u00e1nh c\u00e1ch tai n\u1ea1n do ph\u00f3ng \u0111i\u1ec7n v\u00e0 d\u00f2 \u0111i\u1ec7n.","C. C\u1ea3 2 c\u00e2u \u0111\u1ec1u \u0111\u00fang","D. C\u1ea3 2 c\u00e2u \u0111\u1ec1u sai"],"hint":"","explain":"<span class='basic_left'>Ph\u1ea1m vi kho\u1ea3ng c\u00e1ch an to\u00e0n \u0111i\u1ec7n \u0111\u1ed1i v\u1edbi l\u01b0\u1edbi \u0111i\u1ec7n cao \u00e1p v\u00e0 tr\u1ea1m bi\u1ebfn \u00e1p l\u00e0 kho\u1ea3ng c\u00e1ch \u0111\u1ea3m b\u1ea3o \u0111\u1ee7 an to\u00e0n v\u1edbi \u0111\u01b0\u1eddng truy\u1ec1n t\u1ea3i \u0111i\u1ec7n n\u0103ng, tr\u00e1nh c\u00e1ch tai n\u1ea1n do ph\u00f3ng \u0111i\u1ec7n v\u00e0 d\u00f2 \u0111i\u1ec7n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2569},{"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":"Chim s\u1ebb \u0111\u1eadu tr\u00ean d\u00e2y \u0111i\u1ec7n cao \u00e1p m\u00e0 kh\u00f4ng b\u1ecb gi\u1eadt v\u00ec?","select":["A. \u0110i\u1ec7n th\u1ebf gi\u1eefa 2 ch\u00e2n ch\u00fang b\u1eb1ng nhau ","B. \u0110i\u1ec7n \u00e1p \u0111\u1eb7t l\u00ean ng\u01b0\u1eddi ch\u00fang b\u1eb1ng 0V ","C. D\u00f2ng \u0111i\u1ec7n qua ng\u01b0\u1eddi ch\u00fang b\u1eb1ng 0A ","D. T\u1ea5t c\u1ea3 \u0111\u1ec1u \u0111\u00fang"],"hint":"","explain":"<span class='basic_left'>V\u00ec kho\u1ea3ng c\u00e1ch gi\u1eefa hai ch\u00e2n c\u1ee7a chim s\u1ebb nh\u1ecf, v\u00e0 da c\u1ee7a ch\u00fang c\u00e1ch \u0111i\u1ec7n n\u00ean c\u00f3 th\u1ec3 coi nh\u01b0 \u0111i\u1ec7n \u00e1p gi\u1eefa 2 ch\u00e2n ch\u00fang nh\u01b0 nhau.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2570}],"lesson":{"save":0,"level":2}}