:We're going camping in the forest this weekend. What shall we do then?

:Let's go hiking and collect leaves.

:Sounds great! I want to ____stars(星星)at night，too. That's beautiful.

:I'd like to take some ____. There're many flowers in the forest.

:Good idea! But first，we should ____the tent on the grass. And l want to catch fish in the river. Because your mum ____eating fish.

:Thanks，dear! And we can build campfire and cook fish ____our tent.

如图，在平面直角坐标系中，四边形ABCD是菱形，B、O在x轴负半轴上，AO=$\sqrt{5}$，tan∠AOB=$\frac{1}{2}$，一次函数y=k₁x+b的图象过A、B两点，反比例函数y=$\frac{k_2}{x}$的图象过OA的中点D．

实数a，b在数轴上的位置如图所示，则下列各式正确的是（　　）

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列举在你家人身上能找到的一对相对性状____．