In China, we celebrate International Labor Day on May 1.在中国, 我们在5月1日庆祝国际劳动节.In the solar calendar, May the first is International Labor Day.阳历五月一日是国际劳动节.It's May 1 st, international Labor Day.今天是 “ 五一节”, 国际劳动节....
Experiment on the transesterification of jatropha curcas oil with p - toluene sulphonic acid as catalyst was studied.实验研究了麻疯树油在对 甲苯 磺酸催化剂的作用下与甲醇发生转酯化反应生成脂肪酸甲酯(生物柴油)的情况.Isopropyl p - hydroxybenzoate was synthesized with t...