\u0110\u1ec1 \u00f4n t\u1eadp HK1 m\u00f4n To\u00e1n L\u1edbp 12 – tr\u1eafc nghi\u1ec7m c\u00f3 \u0111\u00e1p \u00e1n – \u0110\u1ec1 s\u1ed1 1<\/a><\/blockquote><\/iframe>