?? ????????????? ???????????
![](http://n.sinaimg.cn/news/transform/200/w600h400/20180403/SF6t-fysuuxz9123831.jpg)
????:1????????:??????????
2???????????
3??????????????
4????????????????
5???????
?????????????2???18????????????????????? (??????????? ??????????????)??????????????????????18????????????,???????????????????«????????????????????????»???????????????????????????????????,???????????????(HGT)??????,???
??40%????????????????????,?????,???????????????????????????????,??;??,?????????????????
??,??????????????????B.bullatus???????????????????B.minor?????????????????????????????????
![](http://i2.chinanews.com.cn/simg/ypt/2025/250218/25d67ea8-f2e1-4caa-a348-bc35065b1eec_zsite.jpg)
???????,????????????,???????????????????????????????????????????????????????????????????
???????????,????????“??”?,???????(???????????????????????????)
???:??