题目

-We'll celebrate the ___________ National Day this year. --That's really exciting.A. seventy B. seventeen C. seventieth 答案：【答案】C【解析】句意：——我们今年要庆祝第七十个国庆。——真令人兴奋。A. seventy七十；B. seventeen十七；C. seventieth第七十。本题考查序数词的用法。生日及纪念日前用序数词，表示第几个，故答案为C。使分式5x-1有意义的x的取值范围是（　　）A．x=1B．x≠1C．x＞1D．x＜1