我的位置：首页 >> 健康频道 >> 健康知识

????

???????????????????????????????????????

??????????????????? 1?????????????????????? 2???????????????????????????????? 3????????????????????????????? 4?????????????? 5?????????????????????????? 6??????????????????????????? ????????????? 1??????????? 2???????????????? 3??????? 4???? 5?????????? 6?????? ???????????????????? ???????????????????????? 1????? 2??????????? 3??? ????? ??????????????????????16.4%????20??3.7%50?27%??????????????????? 14-18???????????????????????????????45???????????????...

“????” 的相关文章

????

??1??6???67????1?2?202?6???18?2??1??2??1?2?3???18-22?????????32?2832 ? ?23???30???
?? 2010-02-03 09:59 ???????

??? 2010-02-03 10:12 ?????????????z????????
?????????
??????????????????????????1625?????54%????44%??2.5
?????...

??

????????P??????I??????????????????????

??peridentalcystanddentigerouscyst????????????????
????????????????
??????????????????????????????????
?????X??????????????????????????????
???????????????????
???????????X????????????????

??
????????????????

??????????1?1?????????18??

???20???

????????? ??????4???16? ???
??????????????????20??4050????????????????12??????????????????
?????????????????????????? ????????,?????? ?? ?????????????????????????????
???????????????????????????
??????????????????????????????????
????????????????????????
??...

??

?? ?? 1 ?? 1 ? ? ??21?21-Trisomy???????????1846Seguin1866??Down??Down\'s syndrome1959?Lejeune????????21?21? 21??????????????? 1.45???1/700???????????32?????????????????????21??????35????1/3004045?1/10045?1/50?????????21??????-Isuperoxide dismutase-ISOD-1?SOD-1?1.021?0.521?1.5SOD-1?1.5???????? ?? ??...

???

??

???
??
???????
? ??

?
?
?????????????L??????????????????????????????????????????????????????????

?????

?????????????????????????????

???????????????????????????

???????????90????????????????

???????????????????????????
?
?????????????????????????????????????????

????????????...