题目

若给定椭圆C：ax2+by2=1(a>0,b>0,ab)和点N(x0,y0)，则称直线l：ax0x+by0y=1为椭圆C的“伴随直线”，    (1)若N(x0,y0)在椭圆C上，判断椭圆C与它的“伴随直线”的位置关系(当直线与椭圆的交点个数为0个、1个、2个时，分别称直线与椭圆相离、相切、相交)，并说明理由；    (2)命题：“若点N(x0,y0)在椭圆C的外部，则直线l与椭圆C必相交.”写出这个命题的逆命题，判断此逆命题的真假，说明理由；    (3)若N(x0,y0)在椭圆C的内部，过N点任意作一条直线，交椭圆C根据句意及首字母提示，完成单词。（5分）【小题1】----Does your father e      every morning?----Yes. He runs every morning.【小题2】Mom, I’m t_________. I want to drink some orange juice.【小题3】I’m going h_________ in the mountains next weekend.【小题4】My parents like to live in the c       , but I like to live in the big city.【小题5】He spent the w___________ afternoon watching TV. And he didn’t finish his homework.