Ch\u01b0\u01a1ng IV – B\u00e0i 47: \u0110i\u1ec1u khi\u1ec3n sinh s\u1ea3n \u1edf \u0111\u1ed9ng v\u1eadt v\u00e0 sinh \u0111\u1ebb c\u00f3 k\u1ebf ho\u1ea1ch \u1edf ng\u01b0\u1eddi<\/a><\/blockquote><\/iframe>