看圖數(shù)數(shù)并回答問題。
![](http://thumb.zyjl.cn/pic1/upload/papers/x03/20110916/2011091613381653110136.gif)
1. How many books are there in the picture?
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2. How many erasers are there in the picture?
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3. How many rulers are there in the picture?
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4. How many pens are there in the picture?
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