题目

你校最近举办了春季运动会，请你为校英文报写一篇报道。内容包括：1）时间和地点；2）运动会的基本情况；3）比赛的意义。注意：1）词数100左右；2）短文题目已为你写好。The Spring Sports Meet 答案：The Spring Sports Meet To raise our awareness of physical health and enrich our school life, our school held the annual spring sports meet on the playground last Thursday and Friday. The students from every class signed up for the sports meet. They took part in different kinds of events, such as running, the high jump, and tried their best to succeed in their selected sports. Some of them even bro已知数列{an}为公差不为零的等差数列，a1=1，各项均为正数的等比数列{bn}的第1项、第3项、第5项分别是a1、a3、a21．（1）求数列{an}与{bn}的通项公式；（2）求数列{anbn}的前n项和Sn．