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...
他病倒后没过几天就又能在床上坐起来了。A few days after his collapse he was sitting up in bed.她坐在床上盯着时钟看了几分钟。For a few minutes she sat on her bed watching the clock.她发现弗朗西丝躺在床上，哭得十分可怜。She found Frances lying on the bed crying pitiably....