His elder sister had been his guide,counselor,and friend.他姐姐过去一直指导他,给他出主意,是他的朋友。Your first step should be to talk to a teacher or school counselor...你第一步应该是去找老师或学校辅导员谈谈。The counselor bilked his clients out of$2 million.那...
Isopentyl lactate was synthesis from acid and isopentyl alcohol in the presence of ferric chloride hexahydrate.在六水三氯化铁存在下可以由乳酸和异戊醇合成乳酸异戊酯.Ferric Chloride alone gives polymer with benzene.三氧化铁可单独催化苯的聚合.The ferric acetylac...