?? ????????????? ???????????
![](http://n.sinaimg.cn/news/transform/200/w600h400/20180330/V3U8-fyssmmc5156763.jpg)
????:1?996?????:????
2??????
3????????
4????????????
5?????400?????
??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)
???????????,????????????,???????
????????????,?????????????“????????????????”??????????????????,??????(??)
??:????????????????????