题目

语篇语法填空阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的适当形式。 People often have trouble （get）used to a new culture. They are usually curious they first arrive in a foreign country. However, if they stay for long time, they may start to feel different (stage) of culture shock. They can feel lonely or sad because they can't deal with the local people. How (quick) people get used to culture differences may depend the way they learn. That's a problem if they can't speak the language. On other hand, some can study the situatio（本小题满分12分） （Ⅰ）一动圆与圆相外切，与圆相内切求动圆圆心的轨迹曲线E的方程，并说明它是什么曲线。 （Ⅱ）过点作一直线与曲线E交与A,B两点，若，求此时直线的方程。