腔肠动物____扁形动物____线形动物____环节动物____软体动物____

节肢动物____鱼____两栖动物____爬行动物____哺乳动物____

A生活在水中，用腮呼吸   B用肺呼吸，皮肤辅助呼吸   C用肺呼吸，在陆地上产卵   D胎生，哺乳   E身体扁平，有口无肛门   F身体分节，运动器官是刚毛和疣足   G身体表面有外套膜   H身体和附肢都分节，有外骨骼I身体表面有刺细胞   J身体不分节，体表有角质层

—____ flowers.

为加强防汛工作，某市对一拦水坝进行加固，如图，加固前拦水坝的横断面是梯形ABCD．已知迎水坡面AB=12米，背水坡面CD=12 $\sqrt{3}$ 米，∠B=60°，加固后拦水坝的横断面为梯形ABED，tanE= $\frac{3}{13}\sqrt{3}$ ，则CE的长为____米．

    Here is some information(信息) about some people.

    I am a math teacher. I teach math very well. Do you need help with your math？Call me at 679－ 8840.(Mr. Brown)

    I lost my blue bag. It's from my mom and I like it very much. Did you find my bag？Please call me at 777－8953.(Lucy)

    I like playing the violin，but I can't play it well. Can you help me？My phone number is 235－ 7765.(Joan)

    Do you like reading？I have many old books and the books are free. Call me at 658－0034.(Mark)

    Here is some information on today's newspaper.

    FOUND

    A blue bag. I found it in the library. My name is Sue. Please call me at 889－0764.

    JOB

    Are you good at math？Are you good with kids？We need a math teacher at our middle school. My name is Nick. My e－mail is nick@gmail.com.

    MUSIC CLUB

    Do you want to be a musician？Do you want to learn how to play the piano and the violin well？ Come to our club. Only 20 yuan for one lesson. Call Susan at 776－9898.

    BOOKS NEEDED

    We want to build a library for the kids in a small village. We need many books. Please call Mr. Han at 458－2217.