八年级(初二)试题
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（1） 利用尺规作图分别作∠AOC和∠BOC的平分线OD，OE（保留作图痕迹，不写作法）．
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（2） 试判断OD与OE的位置关系，并说明理由．
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（1） 图A中②所示耕地类型是，该地区的降水量范围是（ ）A . 水田，多数大于1600毫米 B . 水田，大于800毫米 C . 旱地，400﹣800毫米 D . 旱地，800﹣1600毫米
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（2） 土地利用类型③适合发展的农业部门是（ ）A . 林业 B . 畜牧业 C . 种植业 D . 渔业
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（3） 根据图C判断，东莞市所属的温度带和该温度带作物熟制是（ ）A . 暖温带，一年一熟 B . 亚热带，两年三熟 C . 亚热带，一年两熟到三熟 D . 热带，三年两熟
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（1） I will spend the "Lunar New Year" in 2050 on the moon.
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（2） "Lunar" means "something to do with the earth".
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（3） The first prize is a trip to the moon at the Spring Festival for the winner.
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（4） The first space tourist is a rich businessman who paid millions of dollars to take a ride on a rocket.
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（5） In 2050, common families like mine can have the chance to take holidays in space.
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（6） The first branch of McDonald's will be open in 2050.
Washing the Apples
Mrs. Smith has a shop in the town. There are all kinds of fruit in her shop. She's friendly to the customers and never fools① anyone. So the customers like to buy fruit in her shop, and she gets more and more money.
One day, the apples she sold were all fresh and nice. She remembered her son Steve liked them best, so she brought some home for her son. After lunch, she went out and left the apples on the table. That afternoon Steve came back from school, he felt very hungry. He looked for something to eat and found some apples on the table. "Great! They are my favorite. " he cried and ate a lot. Mrs. Smith got home after she closed her fruit shop. When she saw Steve, she asked him, "Did you have the apples?" Her son answered, "Yes. And I ate lots of them. " "Did you wash them?" Oh, I forgot. I was too hungry②. What should I do? "
A few minutes later, Mrs. Smith found her son kept on drinking water.
"Are you thirsty? Why are you drinking so much water?" asked the mother.
"No, Mom." answered the boy, "I want to wash the apples in my stomach with the water."
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（1） What shop does Mrs. Smith have?A . A clothes shop. B . A food shop. C . A fruit shop. D . A book shop.
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（2） What's Steve's favorite fruit?A . Oranges. B . Pears. C . Bananas. D . Apples.
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（3） Where did Steve find the fruit?A . On the table. B . In the basketball. C . In the kitchen. D . In his bedroom.
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（4） Why did Steve keep on drinking water?A . Because he was very thirsty. B . Because he wanted to wash the apples in his stomach. C . Because he liked drinking water. D . Because he was very hungry.
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（5） Could he wash the apples in his stomach with the water?A . Yes, he could. B . No, he couldn't. C . Sorry, I don't know. D . Yes, I think so.
(m，n为常数).
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（1） 若函数图象由
平移所得，且经过点(4，5)，求函数解析式；
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（2） 若函数图象经过(-1，-2)，且交y轴于负半轴，求m的取值范围.
B . 
C . 
D . 
A river ran down from a mountain through many villages and forests. Then it (arrive) at a desert. "I went through so many (problem). I should have no trouble crossing the desert, she thought. As she started, she found herself disappearing (slow) into the sand. After many tries, she still failed.
this time, a deep voice said, "If a breeze(微风) can cross the desert, so can a river." It wasvoice of the desert. But the river answered, "That's because a breeze can fly, but I can't."
"That's because you can't give up you are. Let yourself evaporate(蒸发)into the breeze and you can cross the desert easily," said the desert.
"Give up what I am now? No! No!" the river (agree)with this idea." The breeze can carry the vapour (cross) the desert and let it leave as rain. The rain will form a river again, "said the desert. "And whether you're a river or vapour, your nature(本性) never changes.
After (hear) this, the river didn't feel . (frighten). It went into the open arms of the breeze. It carried her to the next stage of her life.
中， 
， 
， 
，延长 
到点E，使 
，交 
于点F，在 
上取一点G，使 
，连接 
.有以下结论：① 
平分 
；② 
；③ 
是等边三角形；④ 
，则正确的结论有（ ） 
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（1） 如图甲所示，该装置中乒乓球被弹开，说明了发声的音叉在；乒乓球在实验中的作用是将实验现象放大，这种实验方法是（控制变量/转换）法，该装置还可以探究声音响度与的关系；
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（2） 如图乙所示，随着抽气机不断向罩外抽气，小明听到罩内正在响铃的闹钟铃声的（响度/音调/音色）越来越小，若罩内的空气完全被抽出，将不能听到铃声，由此得出的结论是；
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（3） 如图丙所示，将一把钢尺紧按在桌面上，一端伸出桌面适当的长度，拨动钢尺，可听到钢尺由于振动发出声音；若钢尺伸出桌面的长度保持不变，改用更大的力拨动钢尺，则听到声音的响度变（大/小）；若拨动钢尺的力保持不变，逐渐减少钢尺伸出桌面的长度，听到声音的音调（变高/变低）。
B . 
C . 
D . 
，它的图象犹如老师的打钩，因此人们称它为对钩函数（的一支）.下表是y与x的几组对应值. | x | … | | | | 1 | 2 | 3 | 4 | … |
| y | … | | | | 2 | | | | … |
请你根据学习函数的经验，利用上述表格中所反映出的y与x之间的变化规律，对该函数的图象与性质进行探究.
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（1） 如图，在平面直角坐标系
中，已描出了上表中各组对应值在坐标上的点，请根据描出的点，画出该函数的图象. 
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（2） 请根据图象写出该函数的一条性质：.
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（3） 当
时，y的取值范围为 
，则a的取值范围为.
