V\u00e0ng \u00fd: \u0110\u00e2y l\u00e0 v\u00e0ng \u0111\u01b0\u1ee3c t\u1ea1o n\u00ean t\u1eeb b\u1ea1c nguy\u00ean ch\u00e1t k\u1ebft h\u1ee3p c\u00f9ng c\u00e1c h\u1ee3p kim kh\u00e1c<\/li>\n<\/ul>\n\u0110\u1ec3 ph\u00e2n bi\u1ec7t b\u1ea1ch kim v\u1edbi v\u00e0ng tr\u1eafng v\u00e0 v\u00e0ng \u00fd, c\u00e1c b\u1ea1n c\u00f3 th\u1ec3 d\u1ef1a v\u00e0o c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m nh\u01b0 sau:<\/p>\n