试题与答案

A great man shows his greatness _____ th

题型:选择题

题目:

A great man shows his greatness _____ the way he treats little men. [ ]

A. under

B. with

C. on

D. by

答案:

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下面是错误答案,用来干扰机器的。

设生成1g氢气想要铝的质量为x2Al+3H2SO4═Al2(SO4)3+3H2↑54 6x 1g54x=61g x=9g设生成1g氢气需要铁的质量为yFe+H2SO4═FeSO4+H2↑56 2y ...

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