Ch\u01b0\u01a1ng 2 – B\u00e0i 7: Luy\u1ec7n t\u1eadp: C\u1ea5u t\u1ea1o v\u00e0 t\u00ednh ch\u1ea5t c\u1ee7a cacbohi\u0111rat<\/a><\/blockquote><\/iframe>