I heard you created a new song. Could you sing it?
A:invented
B:developed
C:finished
Don't let any failures ____ ( 阻止,打消…念头) you, for you can never tell how close you may be to victory.
过氧化氢(H2O2)又称双氧水,常温下它是一种液体,它难电离,且易分解.随着社会需求的增长,尤其是生态环境保护的需要,过氧化氢近年来更受到人们的青昧,并称其为绿色氧化剂.为了贮存、运输、使用的方便,工业上采用“醇析法”将其转化成固态的过碳酸钠晶体(其化学式为2Na2CO3•3H2O2),该晶体具有Na2CO3和H2O2的双重性质.
根据上述材料,回答下列问题: