L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 b\u1eaft l\u00f4 r\u01a1i ch\u00ednh x\u00e1c nh\u1ea5t? Tuy\u1ec7t chi\u00eau ch\u01a1i l\u00f4 r\u01a1i \u0111\u1ec3 tr\u1edf th\u00e0nh cao th\u1ee7 l\u00e0 g\u00ec? Nh\u1eefng c\u00e2u h\u1ecfi \u0111\u00f3 s\u1ebd \u0111\u01b0\u1ee3c tr\u1ea3 l\u1eddi c\u1ee5 th\u1ec3 trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y.<\/em><\/span><\/p>\n Kh\u00e1i ni\u1ec7m l\u00f4 r\u01a1i ch\u1eafc h\u1eb3n \u0111\u00e3 qu\u00e1 quen thu\u1ed9c v\u1edbi ng\u01b0\u1eddi ch\u01a1i l\u00f4 \u0111\u1ec1. L\u00f4 r\u01a1i \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 con s\u1ed1 \u0111\u00e3 xu\u1ea5t hi\u1ec7n ng\u00e0y h\u00f4m tr\u01b0\u1edbc, v\u00e0 h\u00f4m sau v\u1ec1 l\u1ea1i (r\u01a1i l\u1ea1i). Vi\u1ec7c theo d\u00f5i v\u00e0 th\u1ed1ng k\u00ea c\u0169ng nh\u01b0 t\u00ednh ph\u1ea7n tr\u0103m x\u00e1c su\u1ea5t l\u00f4 r\u01a1i c\u0169ng l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p hay trong b\u1ed9 m\u00f4n s\u1ed1 h\u1ecdc.<\/span><\/p>\n Ph\u01b0\u01a1ng ph\u00e1p b\u1eaft l\u00f4 r\u01a1i l\u00e0 m\u1ed9t c\u00e1ch ch\u01a1i v\u00f4 c\u00f9ng hi\u1ec7u qu\u1ea3 v\u00e0 d\u1ec5 \u0103n. V\u00ec v\u1eady, n\u00f3 \u0111\u01b0\u1ee3c ng\u01b0\u1eddi ch\u01a1i l\u00f4 \u0111\u1ec1 \u00e1p d\u1ee5ng kh\u00e1 nhi\u1ec1u. <\/span><\/p>\n L\u00f4 r\u01a1i c\u00f3 2 lo\u1ea1i l\u00e0: L\u00f4 r\u01a1i t\u1eeb \u0111\u1ec1 v\u00e0 L\u00f4 r\u01a1i t\u1eeb l\u00f4. X\u00e1c su\u1ea5t \u0103n cao th\u01b0\u1eddng l\u00e0 l\u00f4 r\u01a1i t\u1eeb l\u00f4, c\u1ea7n ch\u00fa \u00fd \u0111\u1ec3 d\u1ec5 d\u00e0ng chi\u1ebfn th\u1eafng khi ch\u1ecdn l\u1ef1a con s\u1ed1 \u0111\u1ec3 \u0111\u00e1nh.<\/span><\/p>\nI. L\u00f4 r\u01a1i l\u00e0 g\u00ec?<\/strong><\/span><\/h2>\n
II. T\u1ea7n su\u1ea5t l\u00f4 r\u01a1i<\/strong><\/span><\/h2>\n
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