manganese peroxide二氧化锰The sample was molten and decomposed with sodium peroxide , leached and acidified hot water and - volumed.试样以过氧化钠熔融分解,热水浸取、酸化,定容.Explain why barium forms peroxide but beryllium does not.解释为什么钡能形成过氧化...
...the safest means of disposing of nuclear waste...处理核废料最保险的方法You did us a great favour by disposing of that problem...你解决了那个问题，可算是帮了我们一个大忙。He had no difficulty in disposing of the fallacy.他毫无困难地驳倒了这个谬论....the cost of d...
My mother always made me feel I wasn't coming up to scratch.母亲总是使我觉得自己不够优秀。Her performance wasn't up to scratch.她的演奏没达到水准." Your work's nowhere near up to scratch, Su Lun!“ 苏伦, 你的工作很坏!...
Mr Short's behaviour is only on the cusp of acceptability.肖特先生的行为勉强能接受。The formal demonstration of system acceptability to obtain authorization for its operational use.为使系统获准投入运行性使用,对系统的可接受性所做的正式演示.In either case, t...
铜是热和电的良导体.Copper is a good medium for the conduction of heat and electricity.木头是热和电的不良导体.Wood is a poor conductor of heat and electricity.铜是电的良导体.Copper conducts electricity well....