题目

With so many children ____round the table, the food disappeared_______． A．seating, at no time         B．seated, in no time C．seated, at no time          D．seating, in no time   答案：B 式子在实数范围内有意义，则x的取值范围是 [　　] A．x＜1 B．x≥1 C．x≤－1 D．x＜－1