????

?21?????DS
??????????????????24?????21????????????????????????
???p???????????
???1/7001/900??20???
????????95%????????????????????20%?3580%?35
?????1%88%??3%??
??DS???????????????????DS???????????????1419?????2ml??
???????????????????????????????????????????????????????
?????????21???????21??????????IQ?20~60???1/4~1/2?????????????????????50%????


??
??21????????????????????????????????????5-6/1000????1/750???????35??????1/350

????????????????80%???????????????????????????????1988???????...