饮用水;挥发性卤代烃;氯仿;四氯化碳.Study on the levels of volatile halogenerated hydrocarbon in drinking Linyi City.摘要研究了碳酸铯催化酚与卤代烃反应制备烷基芳醚.Cesium carbonate catalyzed O - alkylation of phenol to synthesize alkly aryl ethers.此外, 芳基硼酸与卤代烃...
Prostate - specific antigen ( PSA ) is a well characterized human prostate specific glycoprotein.摘要前列腺特定抗原 ( PSA ) 为一已经定性清楚之人类前到腺特定醣蛋白.Purpose : To study antigenic epitopes and expression of P glycoprotein.目的: 研究P糖蛋白抗原表位...
The soldiers were ordered to retreat to safer positions behind the lines.士兵们奉命撤退到后方较为安全的阵地上去.They infiltrated behind the lines so as to annoy the emery replacements.他们渗透敌后以便骚扰敌军的调度....
1972年埃斯皮拉所辅导的学生, 退学率只占6.6%.In 1972, the dropout rate among those whom Aspira counsels was 6 . 6 percent.那么, 赛不在意你帮我辅导的事情吧?So, Sy's cooI with this whoIe tutoring thing, right?罪犯通常都是需要心理辅导的非正常行为者.Offenders are often s...