题目

设复数z=(≤≤18),复数z,(1+i)z,2在复平面上对应的三个点分别是P,Q,R,当P,Q,R不共线时,以线段PQ,PR为两边的平行四边形的第四个顶点为S,则点S到原点距离的最大值是_______. 答案:3请根据以下提示,并结合事例,用英语写一篇短文。 Difficulties arise in the lives of us all. What is most important is dealing with the hard times, coping with the changes, and getting through to the other side where the sun is still shining just for you. 注意:①无须写标题,不得照抄英语提示语; ②除诗歌外,文体不限: ③文中不得透露个人姓名和学校名称; ④词数为120左右。
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