純凈的SO2氣體和純凈的SO3氣體各一瓶中硫元素的質(zhì)量比為5:1,則SO2和SO3的質(zhì)量比是( )A.1:1 B.4:1 C.4.5 D.2.5

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B終終于有問(wèn)正經(jīng)問(wèn)題的時(shí)候了~~~~~