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问题 选择题
Rt△ABC中，∠C=90°，AC=3，BC=4，则sinB等于（　　）
A．
3
4
B．
3
5
C．
4
5
D．
4
3
答案

∵Rt△ABC中，AC=3，BC=4，

∴AB=5，

∴sinB=

AC
AB
，

=

3
5
．

故选B．

完形填空

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B.  The food there tastes good, but I think it’s junk food. We should take care of our eating habits and eat more food with high vitamins and eat less meat.
C.  It’s very important to protect our teeth. Eating too many candies is not only bad for our teeth but also bad for health.
D.  We can see the colorful world by watching TV with our eyes. But we should protect our eyes carefully. We should let them have a rest after watching for one hour.
E. Many people died from smoking them. Smoking brings us serious hurt, and we should get away from it.
 根据上面提供的信息，请帮下面五位同学分别找出与他们相匹配的信息。（5分）
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小题2: I have asked my uncle to stop smoking many times, but it did not work.
小题3:Tony always goes to sleep after meals.
小题4: Most children like to eat at KFC or McDonald’s.
小题5:Nowadays, many students like watching TV at home on weekends for a long time.
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单项选择题 A1/A2型题

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A.甲状软骨

B.环状软骨

C.会厌软骨

D.杓状软骨

E.气管软骨
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