This reaction, called the Hofman elimination, is quite analogous to the dehydrohalogenation of an alkyl halide.这个反应称为Hofman消除反应, 它很像卤代烷的脱卤化氢反应.This paper discussed three methods of producting vinyl etherspreparation from...
Eskimoes form igloos out of blocks of ice.爱斯基摩人用冰块砌圆顶冰舍.Now suppose there are 100 igloos arranged in a rectangular grid.现在,假设有100座冰屋排成长方格形状.Igloos are usually dome - shapedand are made of large slabs cut from compacted s...
Special industrial ceramic 、 magnet material and machining parts , such as Zirconia, Alumina, NdFeB and AlNiCo products.特殊工业陶瓷、磁性材料及制品, 包括氧化锆 、 氧化铝材料制作的机械件, 钕铁硼、铝镍钴材料制作的永磁零件.This machine uses high quality alnico to absor...
风险不可能完全消除，但可以通过防范和培训来降低。You could never eliminate risk, but preparation and training could attenuate it.公司在降低成本方面付出了艰苦卓绝的努力。The company has made heroic efforts at cost reduction.抑郁症会降低人体对疾病的抵抗力。Depression lowers the huma...