⑴ （2014徐汇区一模）已知：如图，△ABC中，点D、E是边AB上的点，CD平分∠ECB，且BC2=BDBA．（1）求证：
证明：（1）∵BC2=BD?BA，
∴BD：BC=BC：BA，
∵∠B是公回共角，
∴△BCD∽△BAC，
∴∠答BCD=∠A，
∵CD平分∠ECB，
∴∠ECD=∠BCD，
∴∠ECD=∠A，
∵∠EDC=∠CDA，
∴△CED∽△ACD；
（2）∵△BCD∽△BAC，△CED∽△ACD，
∴
| AB |
| BC |
| AC |
| CD |
| CE |
| ED |
| AC |
| CD |
| AB |
| BC |
| CE |
| ED |
⑵ 2012年上海徐汇区初三英语一模首字母填空 答案解析
保证抄准确！
86. children 孩子
87. money 钱
88. own
on one's own 独自
89. unusual 不寻常的
90. blowing 吹
91. promise 诺言
92. miss 想念
⑶ 我是徐汇区初三的一名学生，想知道一模考排名前10％要多少分
海淀的孩子如果没加体育475很高了，个人感觉能考个学校，没必要上私立。如果加了体育分数在内区里容算是中下等，排名大概在8000左右（海淀一摸今年比别的区要难），上国际高中分数应该没问题，英语加强口语相信也没什么问题。 有很多学校招生分计划内、学校自主招生和国际班，三个不同的分数段，你可以多参考.
聪明在于学习，天才在于积累。
⑷ （2012徐汇区一模）如图所示的皮带传动装置中，A、B两轮半径分别为rA和rB，已知rA＜rB，且皮带不打滑．
A、轮子边缘上它点抄，靠传送带传动，两点它线速度相等，而半径不等，所以角速度不等．故A错误
3、由A分析得，3正确
C、由a=
| v2 |
| r |
⑸ 徐汇区初三英语一模卷2016作文
Last sunday. I and my father, mother, grandparents, brother went to hutiaoxia
by bus. In the morning we came down the mountain. I saw wooded mountains, wild flowers bloom. We climb up the hill along the mountain path. Come halfway up the mountain, I feel a little tired，it began to rain,My West Lake silk umbrella missed,. Dad said to me,“chenlu， don’t do anything halfway.”at last，So I insisted reached the top, the top of the scenery so beautiful.We were flying kites, I was thirsty, my mother bought me a bottle of water, .finally we went home.finally，Since then, I've kept the umbrella。 was very happy
⑹ 徐汇区初三一模英语作文，求修改语法。谢
Everyone has the best thing or person they know. The best thing I know is the piano. Years ago, I learned how to play the piano. I always spent several hours a day thinking of how to play it well for years. At first, I didn’t like it (was not keen on it替代), and even hated it. In my mind, it was (too)boring (to be addicted to it ). With the increase of age, I can play it well (去well为 fluently in confidence). It not only brings me beautiful music, but also lets me know (去know变expirence) ‘success belongs to the persevering’. 括号里改得更好看点...如果字数不够可以加个总结句.望采纳