P - methoxybenzeneacetonitrile was prepared in 34.8 % yield starting from anisole, via chloromethylation, cyanogenation and fractional distillation.以苯甲醚为原料,经过氯甲基化, 氰化反应后, 通过精馏获得对甲氧基苯乙腈,总收率为34.8%....
Both the toad and frog are amphibian.蟾蜍和青蛙都是两栖动物.Conclusion Onychodactylus fischeri is a relatively primitive type in the amphibian.结论爪鲵在两栖纲动物中属于较原始的种类.It is being actively pursued by amphibian specialists, for example.举...
Confucius is considered the greatest of the ancient Chinese sages.孔子被认为是古代中国最伟大的圣人.Isn't it this food that had bred sages like Confucius?古书上也讲,泰山在中原独高,所以生孔子.Homage was paid to the great sages buried in the city.向安葬在...