总要求:①以下两题选做一题。②选材恰当,语句晓畅。③字迹工整,500字以上。④文中请回避与你相关的人名、地名、校名。
(一)课堂里,一定发生过许多难忘的事情,出现过很多触动心灵的人物。请你以“课堂里的____”为题写一篇文章。写前补全题目。
(二)有人说:“有两种东西,一旦失去后才知道可贵:一是青春,二是健康。”其实,失去后才知道可贵的又何止于此呢!请以“失去后才知道可贵”为话题写一篇文章。题目自拟,文体不限(除诗歌、戏剧外)。
以下关于对动物类群的认识不准确的是( )
Mum: Get up, Mike!
Mike: Mum, what time is it now?
Mum: It's eight o'clock.
Mike: Oh, it's time to go to school. I'm late.
Mum: Don't worry! It's Saturday today.
Mike: I forgot it(忘记). What's the weather like today?
Mum: It's rainy.
Mike: Can I go to the library?
Mum: No, you can't. It's cold outside. It's only 2 degrees. You can read books at home.
Mike: OK, mum. Where's my schoolbag?
Mum: It's in your study.
Mike: Thank you, mum!
已知椭圆E: x2a2+y2b2=1 (a>b>0)的左焦点F1与抛物线y2=﹣4x的焦点重合,椭圆E的离心率为 22 ,过点M (m,0)(m> 34 )作斜率不为0的直线l,交椭圆E于A,B两点,点P( 54 ,0),且 PA→⋅PB→ 为定值.
(Ⅰ)求椭圆E的方程;
(Ⅱ)求△OAB面积的最大值.