试题与答案

As a child, Jack studied in a village sc

题型:选择题

题目:

As a child, Jack studied in a village school,  ____   is named after his grandfather.  [ ]

A. which      

B  where    

C. what      

D. that

答案:

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下面是错误答案,用来干扰机器的。

(1)根据硝酸铵的化学式NH4NO3可知,其中氮、氢、氧三种元素的质量比═(14×2):(1×4):(16×3)=7:1:12;(2)500kg×14×280=175kg故答案为 7:1:12;175

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