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问题 选择题
在Rt△ABC中，∠C=90°，sinA=
1
2
，则BC：AC：AB等于（　　）
A．1：2：5B．1：
3
：
5
C．1：
3
：2		D．1：2：
3
答案

∵在Rt△ABC中，∠C=90°，sinA=

BC
AB
=
1
2
，

∴∠A=30°，cosA=

AC
AB
=
3
2
，

∴BC：AC：AB=1：

3
：2．

故选C．

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Kitty 6219-7830 huamandarin@hotmail.com www.huamandarin.cn
    Are you looking for a place where you can enjoy Chinese study and experience Chinese
culture during the summer holiday? Hua Mandarin could be your wise choice.
    The new summer camp will start on July 28th and end on August 18th. We provide very
small groups with 2-4 people for you to learn Chinese in an effective way. Activities including
calligraphy (书法), painting, culture show, Chinese movies, kung fu, swimming, and so on
will help you walk into Chinese culture with fun. Welcome to call at 62197830 * Kitty for
more details.
Comments
    The earlier camp finished last week. Students are happy here, although they have to learn
a lot upon parents' request (要求). Teachers here are trying to help children to learn in a
funny way.               - Kitty in Shanghai 
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1. Hua Mandarin is the name of a _____.
[ ]
A. person
B. school
C. Chinese course
D. summer camp
2. The new summer camp will last for          .
[ ]
A. half a month
B. twenty-two days
C. one month
D. two months
3. If you want to take part in the new summer camp, you can call at _____.
[ ]
A. 56791830
B. 62187038
C. 62197830
D. 57917380
4. The new summer camp mainly gives children a chance to enjoy _____.
[ ]
A. Chinese movies
B. some paintings
C. Chinese culture
D. some sports
5. You can get more information about the new summer camp by _____.
[ ]
A. making a call
B. sending an email
C. visiting the website
D. all the above
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C．资质审批

D．物业管理审批

E．物业管理
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