由等体积、等pH的Ba(OH)₂、NaOH、NH₃·H₂O三种碱溶液，滴加等浓度的盐酸将它们恰好中和，用去酸的体积分别为V₁、V₂、V₃，则三者的大小关系正确的是(　　)

Hearing the good news that he had been admitted into his dream university after so many years of hard work, his parents couldn't help b____ into tears.

有关俄罗斯社会经济特征的叙述，正确的是（　　）

过抛物线$y^2=4x$的焦点$F$的直线交抛物线于$A,B$两点，点$O$是原点，若$\left|AF\right|=3$，则$△AOB$的面积为(      )