A system which indubitably resolves the isolation between intranet and extranet and exchanging data was not found by research.

经调查，还没有发现真解决内网和外网间隔离和数据自动交换的方案系统。

Which indubitably indicate that the bismuthous sulfide can only dissolve in halogen acid except hydrofluoric acid, the mixed solution of dilute sulfuric acid and alkali halide.

明硫化铋只能溶于氢卤酸（除氢氟酸外）、稀硫酸与碱金属卤化物的混合液中，不能溶于稀硫酸中。