?? a
1?
?????????????????
1.1??
a??????
b????
c ??????
d??????
1.2??
?????????? ??????????????
???????????????????????????????
1.3?
??????
2??
2.1?
????????
a???????????????????????????????
b?????????????
c?????????
??????30??????
???????????????
????????????
2.2?
?????????
a????
????????????
??????????78??????????????
b?
???????????
????????????????????????
??
?????????
???
2.3
???????????????????
?????????????????
???????????????????
3?
??????????????????????...
“?? a” 的相关文章
???????
?:??
1
2
3 ?
4 ??
?
1 ?
2 ?
3 ??????
4 ??
????????????????????????????????????h???????????????????????????????????????????????????
?????????????????????????????
???????46?????????
???????????????
?????????????
??????2760m???,??12???????
,?715??????????????
??
???36???2546m??1???1620
????????...
1
2
3 ?
4 ??
?
1 ?
2 ?
3 ??????
4 ??
????????????????????????????????????h???????????????????????????????????????????????????
?????????????????????????????
???????46?????????
???????????????
?????????????
??????2760m???,??12???????
,?715??????????????
??
???36???2546m??1???1620
????????...
?
?
Down\'s??????????135???????B??-????
21-?(trisomy2lsyndrome)???;??21???1846Sequin??1866Down???Down\'s?1959Lejeune??21???19601961LejeuneClarke????????:21-???????????????M?0.32~3%?0.56~0.64%
:???3:2
[?] ???????I????I????????????(??????????????)??????20~29????0.62~0.88?30~39?1.06~3.74?40~49
?9....
Down\'s??????????135???????B??-????
21-?(trisomy2lsyndrome)???;??21???1846Sequin??1866Down???Down\'s?1959Lejeune??21???19601961LejeuneClarke????????:21-???????????????M?0.32~3%?0.56~0.64%
:???3:2
[?] ???????I????I????????????(??????????????)??????20~29????0.62~0.88?30~39?1.06~3.74?40~49
?9....
21????
??Down????????????1600800????60???
21???????21????????????
21???????????660????????????????2024???1/149040?1/10649?1/11?????I?????80???35?35???? ?????????14??????????????
???????????????????60?????????????????????????????????40???????????????? [?]21??1866?????????????Mongolism????mongolian idiocy??...
21???????21????????????
21???????????660????????????????2024???1/149040?1/10649?1/11?????I?????80???35?35???? ?????????14??????????????
???????????????????60?????????????????????????????????40???????????????? [?]21??1866?????????????Mongolism????mongolian idiocy??...
??????
?????????????????????
?????2????2???????????????????????????????1/4???1/8 ??????
?. ????????????????????????????3???6001000?600?36???600800?612??300?1??13??150?1????kg=??2+78
.? ??????????????????????????????????25???10??47.5? ????????????????????????????cm=??5+80cm??????
.? ??...
?????
????????????????????
1???????????????????
2??????????????????? ???????????????
3??????????????????????????????????????????????????????N???
4??????????????36?????
5???????????????????????
6???????????????????????
???????????????????????
????????10??12?????????????????
???
???12??????...
1???????????????????
2??????????????????? ???????????????
3??????????????????????????????????????????????????????N???
4??????????????36?????
5???????????????????????
6???????????????????????
???????????????????????
????????10??12?????????????????
???
???12??????...