C\u00e0ng t\u00ecm hi\u1ec3u s\u00e2u v\u1ec1 l\u00f4 \u0111\u1ec1 x\u1ed5 s\u1ed1 th\u00ec ch\u00fang ta c\u00e0ng bi\u1ebft \u0111\u01b0\u1ee3c nhi\u1ec1u \u0111i\u1ec1u m\u1edbi m\u1ebb m\u00e0 ch\u1eafc ch\u1eafn ch\u1ec9 d\u00e2n trong gi\u1edbi m\u1edbi bi\u1ebft \u0111\u01b0\u1ee3c. C\u00e1c cao th\u1ee7 l\u00f4 \u0111\u1ec1 \u0111\u00e3 \u0111\u01b0a ra nh\u1eefng quy lu\u1eadt b\u1eaft s\u1ed1 khi\u1ebfn cho tr\u00f2 gi\u1ea3i tr\u00ed c\u00f3 th\u01b0\u1edfng n\u00e0y \u0111\u01b0\u1ee3c n\u00e2ng t\u1ea7m th\u00e0nh m\u00f4n s\u1ed1 h\u1ecdc \u0111\u1ec9nh cao. C\u00e1c c\u1eb7p l\u00f4 hay \u0111i c\u00f9ng nhau m\u00e0 h\u1ecd b\u1eadt m\u00ed d\u01b0\u1edbi \u0111\u00e2y l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a qu\u00e1 tr\u00ecnh nghi\u00ean c\u1ee9u t\u00ecm t\u00f2i c\u00e1c quy lu\u1eadt trong m\u1ed9t th\u1eddi gian d\u00e0i.<\/strong><\/p>\n C\u00f3 r\u1ea5t nhi\u1ec1u c\u00e1ch b\u1eaft c\u1ea7u l\u00f4 theo gi\u1ea3i \u0111\u1ec1 v\u1eeba ra c\u1ee7a m\u1ed9t \u0111\u00e0i b\u1ea5t k\u1ef3. Theo \u0111\u00f3 ng\u01b0\u1eddi ch\u01a1i c\u00f3 th\u1ec3 d\u1ef1a v\u00e0o b\u1ea1c nh\u1edb l\u00f4 \u0111\u1ec1 \u0111\u1ec3 t\u00ecm ra c\u1eb7p s\u1ed1 n\u00e0o s\u1ebd c\u00f3 t\u1ef7 l\u1ec7 xu\u1ea5t hi\u1ec7n cao nh\u1ea5t xung quanh chu k\u1ef3 n\u1ed5 c\u1ee7a m\u1ed9t con \u0111\u1ec1. N\u00f3i m\u1ed9t c\u00e1ch d\u1ec5 hi\u1ec3u l\u00e0 \u0111\u1ec1 h\u00f4m nay ra con g\u00ec th\u00ec k\u1ef3 t\u1edbi ta s\u1ebd bi\u1ebft n\u00ean ch\u01a1i c\u1eb7p l\u00f4 n\u00e0o theo quy lu\u1eadt <\/span>nh\u1eefng c\u1eb7p l\u00f4 \u0111\u1ec1 hay v\u1ec1 c\u00f9ng nhau<\/b> n\u00e0y.\u00a0<\/span><\/p>\n Nh\u1eefng c\u1eb7p s\u1ed1 n\u00e0y \u0111\u01b0\u1ee3c b\u1eaft 2 chi\u1ec1u ngh\u0129a l\u00e0 n\u1ebfu \u0111\u1ec1 n\u1ed5 con n\u00e0y th\u00ec l\u00f4 v\u1ec1 con s\u1ed1 kia v\u00e0 ng\u01b0\u1ee3c l\u1ea1i n\u1ebfu \u0111\u1ec1 n\u1ed5 con s\u1ed1 kia th\u00ec l\u00f4 s\u1ebd ra con c\u00f2n l\u1ea1i.<\/span><\/p>\n C\u00e1c c\u1eb7p l\u00f4 hay v\u1ec1 c\u00f9ng nhau<\/b> \u0111\u00e3 \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn t\u1eeb r\u1ea5t l\u00e2u. Qua th\u1eddi gian t\u1ed5ng h\u1ee3p nh\u1eefng quy \u01b0\u1edbc n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 s\u1ed5 b\u1ea1c nh\u1edb v\u00e0 c\u00e1c b\u1ea1c th\u1ee7 th\u01b0\u1eddng s\u1eed d\u1ee5ng ch\u00fang nh\u01b0 m\u1ed9t c\u00e1ch b\u1eaft c\u1ea7u th\u00f4ng d\u1ee5ng, \u0111\u01a1n gi\u1ea3n, t\u1ed1n \u00edt th\u1eddi gian m\u00e0 hi\u1ec7u qu\u1ea3 kh\u00e1 cao. Nh\u1eefng c\u1eb7p l\u00f4 n\u00e0y n\u1ebfu k\u1ebft h\u1ee3p v\u1edbi nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p soi c\u1ea7u kh\u00e1c s\u1ebd mang l\u1ea1i t\u1ef7 l\u1ec7 chi\u1ebfn th\u1eafng cao h\u01a1n r\u1ea5t nhi\u1ec1u.<\/span><\/p>\n C\u00e1ch soi c\u1ea7u l\u00f4 n\u00e0y c\u0169ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n hai chi\u1ec1u gi\u1ed1ng nh\u01b0 c\u00e1c b\u1eaft l\u00f4 t\u1eeb \u0111\u1ec1 n\u00eau tr\u00ean.<\/span><\/p>\n Ngo\u00e0i nh\u1eefng c\u00e1ch b\u1eaft l\u00f4 \u0111\u1ec1 theo b\u1ea1c nh\u1edb n\u00f3i tr\u00ean th\u00ec quy lu\u1eadt c\u00f2n \u00e1p d\u1ee5ng v\u1edbi c\u00e1c th\u1ee9 trong tu\u1ea7n. C\u1ea7u n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m nghi\u1ec7m v\u00e0 nhi\u1ec1u ng\u01b0\u1eddi ch\u01a1i theo.<\/span><\/p>\n M\u1eb7c d\u00f9 c\u00e1c quy lu\u1eadt n\u00e0y kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng ch\u00ednh x\u00e1c nh\u01b0ng \u0111\u00e3 h\u1ed7 tr\u1ee3 ng\u01b0\u1eddi ch\u01a1i m\u1ed9t c\u00e1ch t\u1ed1i \u0111a trong vi\u1ec7c d\u1ef1 \u0111o\u00e1n k\u1ebft qu\u1ea3 x\u1ed5 s\u1ed1 k\u1ef3 ti\u1ebfp theo. Quy lu\u1eadt <\/span>c\u00e1c c\u1eb7p l\u00f4 hay \u0111i c\u00f9ng nhau<\/b> ch\u1ec9 c\u00f3 t\u00ednh t\u01b0\u01a1ng \u0111\u1ed1i, tham kh\u1ea3o n\u00ean c\u1ea7n k\u1ebft h\u1ee3p nhi\u1ec1u y\u1ebfu t\u1ed1 kh\u00e1c m\u1edbi th\u1ef1c s\u1ef1 \u0111em l\u1ea1i chi\u1ebfn th\u1eafng cho ng\u01b0\u1eddi ch\u01a1i. <\/span><\/p>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n <\/p>\n<\/div>\n <\/p>\n<\/div>\nNh\u1eefng c\u1eb7p l\u00f4 hay xu\u1ea5t hi\u1ec7n theo \u0111\u1ec1<\/b><\/span><\/span><\/h2>\n
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Nh\u1eefng c\u1eb7p s\u1ed1 hay v\u1ec1 c\u00f9ng nhau<\/b><\/span><\/span><\/h2>\n
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C\u00e1c c\u1eb7p l\u00f4 \u0111\u1ec1 hay ra theo th\u1ee9 trong tu\u1ea7n<\/b><\/span><\/span><\/h2>\n
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c\u1ea7u ch\u1ed1t s\u1ed1 xs v\u00edp mi\u1ec1n b\u1eafc<\/strong><\/div>\n
soi c\u1ea7u mb b\u1ea1ch th\u1ee7 l\u00f4 2 nh\u00e1y mb<\/a><\/strong><\/h4>\n
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