单项选择题
1、 （     ）
 


2、 不等式|2x一3|≥5的解集是
A．
B．
C．
D．


3、 下列既是海港又是河港的城市是（　　）
A．青岛、宁波
B．上海、广州
C．大连、天津
D．武汉、哈尔滨


4、 下列现象中昼夜温差的是（　　）
A．陆地昼夜晴天
B．海洋昼夜多云
C．海洋昼夜晴天
D．陆地昼夜多云


5、 下列反应中，所通入的气体既是氧化剂又是还原剂的是(　　  )
A．将SO₂通入氢硫酸中
B．将NO₂通入水中
C．将Cl₂通入溴化钾溶液中
D．将NH₃通入稀硝酸溶液中

6、 光以45°的入射角从空气射入冰中，在冰中的折射角是30°．当光从冰射向空气时，产生全反射的临界角是（　　）
A．15°
B．30°
C．45°
D．75°


7、 阅读下列短文，回答题。
There once was a village that had among its people a very wise old man. The villagers trusted this man to provide them with answers to their questions.
One day, a farmer from the village went to the wise man and said," My ox has died and I have no animal to help me plough my field! Isn't this the worst thing that could have possibly happened?" The wise old man replied, "Maybe so, maybe not. " The man thought the wise man had gone mad.
The very next day, however, a strong, young horse was seen near the man's farm. The man caught the horse. How happy the farmer was! He went back to the wise man to apologize. "You were right, wise man. Losing my ox wasn't the worst thing that could have happened. I never would have caught my new horse if that had not happened. This is the best thing that could have happened. " The wise man replied once again, "Maybe so, maybe not. " The farmer thought surely the wise man had gone mad now.
A few days later the farmer's son was thrown off the horse when riding it. He broke his leg and would not be able to help with the crop. Once again, the farmer went to the wise man, "You were right again. Catching my horse was not a good thing. My son is injured. This time I'm sure that this is the worst thing that could have possibly happened. " But, just as he had done before, the wise man replied once again, "Maybe so, maybe not. " The farmer stormed back to the village.
The next day soldiers arrived to take every able-bodied man to the war that had just broken out.
The farmer's son was the only young man in the village who didn't have to go. He would live, while the others would surely die.
Remember: maybe so, maybe not.
What happened to the wise man one day?
A．His ox had died.
B．He had no animal to help plough his field.
C．He had gone mad.
D．A farmer came to say the worse thing had happened.


8、 下列四句话填写在文中的横线上，顺序恰当的是（　　）
①仰望着蓝天白云，    ②摘下一条碧绿的柳叶，
③吹一声尖厉的哨子，  ④卷成一个小筒，
她跟着大姐姐，__________ 惊得两个小黄鹂飞起。
A．④③①②    
B．②④①③    
C．②④③①    
D．①③②④

填空题
9、 曲线y=2sin x在点(π，0)处的切线的斜率为__________.


简答题
10、 (本小题满分13分)

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