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问题 填空题

已知集合A={（x，y）|4x+y=6}，B={（x，y）|x-y=4}，则A∩B=______．

答案

∵集合A表示直线4x+y=6上的点，集合B表示直线x-y=4上的点

∴A∩B表示两直线的交点的集合，

由

4x+y=6
x-y=4
得，
x=2
y=-2

∴直线4x+y=6与直线x-y=4的交点坐标为（2，-2）

故答案为{（2，-2）}

阅读理解

A bus stops at a small bus stop. A man is hungry and he wants to buy some cakes. It’s raining(下雨) hard. He doesn’t want to go out in the rain. He sees a boy. 'Come here, boy!' he cries. 'Do you know how much the cakes are?' The boy says yes. The man gives the boy four dollars and asks him to buy two cakes. 'One is for you and one is for me.' Three minutes later, the boy comes back. He’s eating a cake. He gives the man two dollars and says, 'Sorry, there is only one cake left.'

小题1:Where is the man?

A．He’s near the bus.

B．He is at home.

C．He’s on the bus.

D．He is in the car.小题2:The man doesn’t want to go out because__________.

A．he is tired

B．he doesn’t like rain

C．he is hungry

D．it’s raining hard小题3:How many cakes does the boy get?

A．One

B．Two

C．Three

D．Four小题4:How much are they if we buy five cakes?

A．five dollars

B．Four dollars

C．Ten dollars

D．Fifteen dollars小题5:What’s the result (结果)?

A．The man eats the cake.

B．The boy eats the cake.

C．The boy doesn’t eat the cake.

D．The boy and the man both eat the cakes.
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判断题

83M2脱硫溶液不能打到265、110M2脱硫。
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