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短文填空。 This winter, I have a good time in Singapore with my parents. It is a small country, but it is very clean and (1) b______. We can see many trees and flowers of different (2) c______. We stay in a five-star (3) h______. It's great. The rooms in it are big, bright and clean. In (4) f_____ of my room is a swimming pool. I like (5) s______ so much that one day I swim in it for five (6) h______. My mother and I really like Singapore, (7) b______ there are so many big stores. We can buy lots of things (8) a______ a good price. In the evening, we often go (9) o______to eat some local (当地的) food. The most interesting thing for me is the night club near our hotel. In the club, we (10)e______ good music and dancing. It's really exciting,
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【简答题】已知椭圆C中心在原点、焦点在x轴上，椭圆C上的点到焦点的最大值为3，最小值为1． （Ⅰ）求椭圆C的标准方程； （Ⅱ）若直线l：y=kx+m（k≠0）与椭圆交于不同的两点M、N（M、N不是左、右顶点），且以MN为直径的圆经过椭圆的右顶点A．求证：直线l过定点，并求出定点的坐标．
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