The adsorption of hexavalent chromium by in solubilized humic acid was investigated.研究了不溶性腐殖酸对六价铬的吸附作用.Can determine a chemical into the EU limit for hexavalent chromium test instructions.可用化学法进一部确定,欧盟针对六价铬的测试限量指令.Hexava...
Many schools were in danger of closing because the children were bused out to other neighborhoods.很多学校面临倒闭的危险，因为学生被校车送到其他社区就读了。Simulation shows that HPMSM control bused on nonlinear decoupling control theory has good per...
这些课程介绍的是统计学理论的基础。These courses provide the groundwork of statistical theory.介绍的方式很重要.The manner of presentation is highly important.对于音乐爱好者来说,他是无须介绍的.He needs no introduction to the music loving public....