自古以来，和平就是人类最持久的夙愿。为争取国内和平，1945年8月***出席了（   ）

$\frac{\text{9}}{\text{10}}$ ____ $\frac{\text{7}}{\text{10}}$        $\frac{\text{21}}{\text{100}}$ ____ $\frac{\text{53}}{\text{100}}$        $\frac{\text{3}}{\text{100}}$ ____ $\frac{\text{31}}{\text{100}}$

写出下列反应的化学反应方程式，并在括号内标明其所属的基本反应类型。
（1）红磷在空气中燃烧（____  ）
（2）加热高锰酸钾制氧气 （  ____   ）

     This course is for those who want to learn to type, as well as those who want to improve their typing. The course is not common. You are tested in the first class, and begin practising at one of eight different skill levels. This allows you to learn at your own speed. Each program lasts 20 hours. Bring your own paper.
Course fee: $125      Materials:  $25
     Two hours for each evening for two weeks. New classes begin every two weeks.
This course is taught by a number of professional business education teachers who have successfully taught typing course before.
UNDERSTANDING COMPUTERS
This twelve-hour course is for people who do not know very much about computers, but who need to learn about them. You will learn what computers are, what they can or can't do and how to use them.
Course fee：$75  Jan 4,7,11,14,18  Wed.&Sat. 9:00---11:30 a.m.  Equipment fee:$10
David is a professor of Computer Science at Beijing University. He has over twenty years of experience in the computer field.  
STOP SMOKING
    Do you want to stop smoking? Have you ever tried and failed? Now is the time to stop smoking using the latest methods. You can stop smoking, and this twelve-course will help you do it.
Course fee：$30  Jan 2,9,16,23   Mon 2:00---5:00 p.m.
Dr. John is a practicing psychologist who has helped hundreds of people stop smoking.

孟子曰：“人告之以有过，则喜。”这说明正确认识自我的途径是（    ）