问题 选择题
函数y=
-x2-3x+4
x
的定义域为(  )
A.[-4,1]B.[-4,0)C.(0,1]D.[-4,0)∪(0,1]
答案

x≠0
-x2-3x+4≥0

得-4≤x<0或0<x≤1,

故选D.

材料分析题

时隔8年,“天下第一会”糖酒会再度花开郑州,2009年10月11日-14日,第81届全国糖酒商品交易会在郑州国际会展中心举办 。此次展会展览面积、参会人数、广告规模等多个方面都创郑州展会多项历史之最。主要包括酒类、食品类、调味品类和食品机械类等,涵盖了全国酒类行业设计、生产、经营、销售、配送等产业链。20万糖酒会客商汇集郑州。

(1)在糖酒会其间,你搜集了哪些精美的宣传标语?

                                                                                                                                                               

(2)时隔8年,“天下第一会”为什么能再度花开郑州?

                                                                                                                                                             

                                                                                                                                                             

(3)热爱家乡、关心河南,作为河南人,在糖酒会上你是如何为河南增光添彩的?

                                                                                                                                                              

                                                                                                                                                              

单项选择题