Three novel Schiff bases were synthesized using the reaction of 4 - aminoatipyrine with 3 - formylchromone, cinnamaldehyde and anisaldehyde.用 4- 氨基安替比林与 3- 甲酰基色酮 、 肉桂醛、茴香醛反应分别合成了3种新的席夫碱化合物....
我们的历史教师总爱概括地讲, 从不详述任何史实.Our history teacher is always generalizing; he never deals with anything in detail.他概括地说了整个情况.He had put the whole situation in a nutshell.有必要概括地讲一下有关的高斯公式.It will be useful to summarize the relev...
Vipers ( adders ) and rattlesnakes manufacture the blood poison, which is known as haemolytic.蝰蛇 ( 小蝰蛇 ) 和响尾蛇产生血液毒素, 称为溶血性毒液.Full adders are discussed, and a multiplexer based full adder is designed.文章讨论几种全加器的设计, 并设计了一种基...