The Special Olympics

    The Olympics are some of the most exciting sports events in the world. But there is another Olympics about which you may not have heard. This is the Special Olympics, for people with mental disabilities.

    The first Special Olympic Games were held in Chicago in 1968. One thousand people competed in many events. Since then Special Olympic programs have been organized in all 50 states and more than 150 countries. Today more than a million people take part in the Special Olympics.

    Mentally disabled persons over the age of eight may take part in the Special Olympics. These people may also have physical disabilities. People have run in races using crutches or walkers. A young girl enter the long jump event with an artificial leg. A blind runner raced around the track with the help of his coach's voice. A deaf basketball team planned their plays using sign language.

    Winning is wonderful for people who may never have had much success. But training for and entering the Special Olympics is also important. The participants become more confident. They learn how to concentrate in order to play well. Then they use that concentration in school to improve their schoolwork. Like anyone else they feel great when they prove they can do something well.

假定你是李华，你校外籍教师Miss Rose常常在课余时间辅导你英语口语，使你在上周学校举行的英语演讲比赛中荣获第一名。为此，你决定写一封感谢信，对Miss Rose的帮助表示真诚的感谢。

注意：1)文章包括上述内容，可适当增加细节，以使行文连贯；

2)词数100左右；

3)信的开头和结尾已为你写好，但不计入总词数。

Dear Miss Rose,

    I am writing to you

    ……

    I'm looking forward to hearing from you.

Yours sincerely,

Li Hua

在Rt△ABC中，∠C为直角，sinA=$\frac{\sqrt{2}}{2}$，则cosB的值是(        ).