美国领土除本土外，还包括北美西北的____州和太平洋上的____州。

某校运动员分组训练，若每组7人，余3人；若每组8人，则缺5人；设运动员人数为x人，组数为y组，则列方程组为

材料解析
阅读下列材料，回答问题。
材料一： “外争国权，内惩国贼” “拒绝在和约上签字”
材料二 ：“6月5日上海日商纱厂的中国工人首先罢工，……接着，机器纺纱、印刷、公共交通、码头、船坞等业的工人相继罢工。”
请回答：
（1）材料一中的口号是在哪一事件中提出来的？
（2）材料一中的和约是在哪一次会议上签订的？
（3）这一事件的性质如何？对中国历史最重大的影响是什么？
（4）你认为“五四精神”的核心是什么？今天我们应该如何发扬五四精神？

    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.