物质的量之比为2:5的锌与稀硝酸反应,若硝酸被还原的产物为N2O,反应结束后锌没有剩余,则该反应中被还原的硝酸与未被还原的硝酸的物质的量之比是( ) A. 1 :4 B.1 :5 C. 2 :3 D.2 :5 答案:A 解析: 略_____, I think, and the problem can be settled.A.If you double your effortsB.If you make greater effortsC.If you spare no effortsD.Some more efforts