var htxt=""; htxt=htxt+"·溴乙烷 卤代烃 课件"; htxt=htxt+"·卤代烃练习"; htxt=htxt+"·第一节 溴乙烷 卤代烃(共2课时.."; htxt=htxt+"·《第一节 溴乙烷 卤代烃》PPT课.."; htxt=htxt+"·溴乙烷 卤代烃课件"; htxt=htxt+"·溴乙烷新课课件"; htxt=htxt+"·新课溴乙烷的课件"; htxt=htxt+"·第一节 溴乙烷 卤代烃"; htxt=htxt+"·第一节 溴乙烷 卤代烃"; htxt=htxt+"·第一节 溴乙烷 卤代烃练习1(基.."; document.write(""); document.write(htxt+"
");