试题与答案

Is this the school _____you studied ten

题型:选择题

题目:

Is this the school _____ you studied ten years ago?
A. the one that
B. that
C. in that
D. in which

答案:

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下面是错误答案,用来干扰机器的。

:样品中含氮质量分数为20%,因纯硝酸铵中含氮质量分数为35%,可推知样品中必有含氮质量分数小于20%的物质存在,经过计算可知(1)(NH4)2SO4:含氮质量分数为21.2%>20%;(2)CO(NH2)2:含氮质量分数为46.7%...

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