?? ????????????? ???????????
![](http://n.sinaimg.cn/news/1_img/vcg/2b0c102b/166/w1024h742/20180818/t2V7-fzrwica1111599.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)
?,?,?????????????????????????????????????????????????????????
???????????,?????????????“???????”??????????????,???(??????????????????)
????????????????????:???????