石莉回答：
第一句是被动前置,第二句中是主动关系.
1,已知各项都为正数的等比数列an中,a1a5-2a3a5+a3a7=36,a2a4+2a2a6+a4a6=100,求数列的通项公式2,等比数列an的公比q不等于1,且a2,a3,a1成等差数列,求（a3+a4)(a5+a6)的值3.已知数列an的通项公式为an=(2n_1)*7^n,
hold到底有没有被动语态?不能用于被动语态的及物动词或动词短语：fit,have,hold,marry,own,wish,cost,notice,watchagreewith,arriveat/in,shakehandswith,ThesportsmeetingwasheldinourschoollastFriday.
lights,overpass,straight,the,go,take,ahead,tge,at,traffic,and连词成句
连词成句you,trip,I,hope,have,good,a.on,right,the,marketon,right,the,market,is,fruit,your.was,day,it,eaciting,an.thingslifethe,free,in,best,are.some,to,visit,places,he,interesting,wants.和一份英语作文假如现在是课外活动时间
【1.aclassmeeting,have,will,We,thisNovember.2.amodelplane,see,wasHe,making,I,to,when,came,him3.He,told,the.news,him,had,before,already,known,you4.She,thenextweek,she,get,married,would,said5.learningEnglish,when,openedhisdoor,Theboy,was,on】
【介绍自我的英文作文.500字的我叫***,生活在襄樊市**县,喜欢玩和吃喜欢吃甜食,对辣椒等东西过敏,爱耍小脾气,喜欢的运动有游泳,打羽毛球,爱听音乐和跳舞,喜欢弹电子琴,喜欢美术课,音乐课,】
