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...
a mirror in an ornate gold frame镶着豪华金框的镜子The style is ornate and highly decorative.这种风格很华丽,而且装饰效果很好.The frames on the pictures are ornate with flowers and fruit painted in gold.照片的相框用金黄色的花朵和水果装饰得非常华丽....