根据短文内容，选择正确答案。

    Library of Congress (国会）is in the United States. This library is the largest library in the world. It is 3 stories high and the book shelves in it are 500 kilometers long.

    Resources

    The library has a large collection of resources like newspapers，magazines, CDs, videos and CD-ROMs. There are also many rooms for people to meet each other or listen to music. It also has a language learning center. It gets 2,000 questions a day, and some can be answered in a few minutes. Some need more time, sometimes a few months. All workers in the library use computers to help them.

    How to join

    If you are a middle school or above, then you can come to the library and fill in a form. Don't forget to bring your ID card. You must be an American and live in the United States.

    If you have time, come along to America and take a look around for yourself!

下列表格是10所学校初中生课外活动问卷调查统计（共调查1000人） 

针对调查表中所反映的问题，我们中学生应该 （       ）                               

①增强创新意识，制定创新驱动战略        ②积极参加志愿者活动，自觉服务社会

③诚信学习，诚信考试                            ④要加大学习压力，确立终身学习的观念

坐在温馨的物理考场，仔细想想：你平时走路的步幅约为50 ____　，上体育课时你跑100m所需时间约为16 ____　（填上合适的物理量单位）．

照样子，分解音节。

 bā  —— b—ā

 jǔ  ——____—____      qù ——____—____

 xū——____—____        nǚ ——____—____