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—— Datou Ge Hongyu made few mistakes in the competition of singing, ________ ?—— _____________. I think his perform was the most wonderful in The Voice of China.
亚洲唯一的发达国家是( )
人类控制人口的最终目的是为了( )
已知函数y=ax2+bx+c的图象如图所示,那么关于x的方程ax2+bx+c+1=0的根的情况是( )