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问题 解答题

梯形上底与下底和9五半，乘梯形9高就是f9面积．______．（判断对错）

答案

因为梯形的面积计算公式：S=

1
2
（a+b）h，所以梯形的上下底和的一半，再乘高，就是这个梯形的面积，原题说法正确．

故答案为：√．

写作题
阅读短文内容，依照示例F，将A-E分别填入空缺处，使标题与内容相匹配。
                              F
     In school, don't feel something. You
should join in all kinds of activities difficult
or boring. You should be interested in all
subjects. 		                          1 
     Eating good meals is necessary,
or you will be thinking about food in
class. Go to bed on time and keep
having enough sleep. Do more sports
to keep your body strong.
                          2 
     Don't make any excuse if you put off
today's things to tomorrow. If the class
is held up (耽误), it's difficult to catch up
with others. 		                      3 
    If you fail some exams, you can feel
disappointed (沮丧的). It doesn't matter.
A person is never perfect. Sometimes he
also has unpleasant things.
                         4 
     You shouldn't play computers too
much on weekends. You should often
do some sports and go out for a walk
every day. 		                       5 
       If your last grade was a C, you
should work hard for a B. Always think:"
I'll speak in class five times this week,"
or "I'll remember ten English words a
day".
A. Plan Your Time
B. Do Today's Work Today
C. Set Goals
D. Keep Healthy
E. Keep Hopeful
F. Be Positive about School
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填空题

已知a、b为△ABC的两边，且满足a2+b2=2ab，你认为△ABC是______三角形．
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