题目

2 ． 答案：2． 点评：  此题考查了一元二次方程根与系数的关系．此题比较简单，解题的关键是掌握：若二次项系数为1，常用以下关系：x1，x2是方程x2+px+q=0的两根时，x1+x2=﹣p，x1x2=q的性质的应用．Though it rained hard, a lot of fans were waiting at the exit of the airport, __________ to see their famous pop stars.A．eagerB．greedyC．nervousD．curious