题目

FeS与足量的稀硝酸反应,生成Fe(NO3)3、S、NO和H2O。若反应中有0.3mol的电子转移,则参加反应的硝酸中未被还原的硝酸的物质的量为(    ) A.0.9mol      B.0.45mol       C.0.3mol      D.0.1mol 答案:CIn his speech he ________ to the great help the club received from supporters. [  ] A.referredB.mentioned C.pointedD.remarked
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