已知梯形的面积上底和下底怎么求高

62．菜豆是自花授粉的植物,其花色中有色花是白色花的显性.一株杂和有色花菜豆Cc生活在海岛上,如果海岛上没有其他菜豆植株存在,且菜豆为一年生植物,那么三年之后,海岛上开有色花菜豆植 将CO和CO2的混合气体2.4克通过足量的灼热的CUO后,得到CO2的质量为3.2克,求原来混合气体中CO和CO2的质量比? 这道题怎样做知识竞赛那道 什么叫客体?它与客观存在是什么关系? 一定要写出过程,1.一个竖直放置,开口向下的圆柱形玻璃钢,全部浸没在水里.缸的上部留有适量空气,恰好使玻璃钢处于悬浮状态.如施加外力,改变玻璃钢在水里所处的深度,然后撤去外力,正确 哲学上的客观实在与客观存在到底什么关系? 这个字“火尽”怎么念的? 羊字头下一个火是什么字?如题 英语作文(考拉)根据信息,写一篇英语短文介绍考拉,要求不少於80字.Name:KennyFrom:South AustraliaLooks:big ears,a big nose,no tail,not fat,about 80cm tall and about 14kg.Like:sleep(for about 20hours a day)Food:leavesOther feature 以初一的英语水平给我一篇介绍考拉的作文,不少于80字 这两题不会做 两道题不会做 有两题不会做. 这两题都不会做 这两题不会做了 上面一个羊字头,下面一个“我”是什么字? 上面一个羊字头下面食字是什么字 大哥大姐帮忙翻译一下Unit is stored at a temperature of 70℃/1 hours and -25℃/1 hours total 40 cycles. After which the measurement is made immediately or after 1 hour. The performance is normal. 英语翻译黄毛黄毛,睡到食朝,听老碗晌,巷屎乱抢.羞羞羞,猫裏打胡鳅,胡鳅钻落泥,猫裏唉腮腮.又叫又笑,黄古射尿,射到伯公下,黏只烂屍八 你这笨蛋英文怎么说 你永远是我的笨蛋英文怎么说? 英语翻译안녕 하세요,저 는 펭 Sijia,저 는 하 한의 여학생 입 니 다,김 현 중 · 닉 쿤 내 가&# 英语翻译 王伯伯把8000元存入银行,定期一年,年利率按百分之2.25计算 （1）到期后利息是多少元（2）利息按百分之20计算,王伯伯税后得到的利息是多少(3)到期后,实际取出多少元 委屈英文怎么写 笨蛋的英文?谁知道笨蛋的英文 what's the difference between a great deal of and a great number of can you tell me any other expressions like that,if possible?such as a lot of and a great many of ,thank you very much What's the difference between "be home to" and "be the home of"?Thank you. 李老师有10000元,打算存入银行三年,有几种储存方法?哪个办法得到的税后利息多一些?（一年期的年利率是2.25%,两年期的年利率是2.79%,三年期的年利率是3.33%,利息税为5%） What is the i_______ of television on children?Someone s_________ my bicycle while I was shopping yesterday.The opposite of possible is i__________.You were e__________ in the English competition.In Sweden,it is against the l________ to hit a child. 求英语作文（1）discuss the effects of the internet on children 以这个题目为题写一篇不少于150字的英语作文.my view on children's watching tv