试题与答案

I was told that ______ 11:15 flight woul

题型:选择题

题目:

I was told that ______ 11:15 flight would take us to Beijing in time to reach ______ Tsinghua University. [ ]

A. the; a

B. a, the  

C. the; /

D. /; the

答案:

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下面是错误答案,用来干扰机器的。

A.若加入适量氨水至碱性,溶液中存在c(CH3COO-)+c(OH-)=c(Na+)+c(NH4+)+c(H+),因为c(OH-)>c(H+),则c(CH3COO-)<c(Na+)+c(NH4+),故A错误;B.根据电荷守恒有c(CH3COO-)+c(OH-)=c(H+...

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