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问题 填空题
直线y=kx+b过一、二、三象限，则反比例函数y=
kb
x
的图象在第______象限内．
答案

∵直线y=kx+b过一、二、三象限，∴k＞0，b＞0，

∴kb＞0，

∴反比例函数y=

kb
x
的图象在一、三象限．

故答案为：一、三．

选择题

下列说法中，不正确的是（　　）

A．活性炭能将硬水软化

B．不锈钢是一种合金

C．铁制品表面刷漆能防锈

D．塑料属于合成材料
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问答题

New York is one of the most exciting cities in the world.

You might want to do some shopping in New York. Fifth Avenue is probably New York’s most famous shopping street, but if you go, be prepared to "window shop" only. This is shopping for the rich. There are other, less expensive shopping areas nearby, and you’ll soon find famous stores such as Bloomingdale’s, Macy’s and FAO Schwartz. And if you’ve brought your rollerblades(滑板), then a visit to Central Park is a must. This is a large, open park right in the middle of Manhattan, but if you thought that people came here to relax, then you’d be wrong. Nobody sits in Central Park: they run, jog(慢跑), and most of all they rollerblade.

When you leave New York, you might be tired, but the one thing you won’t be is bored!

What do people often do in Central Park
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