单选题:根据以下材料,回答题。Thanks to the help of this sonic device, blind pe

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题目内容:
根据以下材料,回答题。


Thanks to the help of this sonic device, blind people can hear obstacles in the way speaking out their names.
A. Right
B. Wrong      
C. Not mentioned
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把下面六个图形分为两类,使每一类图形都有各自的共同特征或规律,分类正确的一项是(  )。

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2008年住宅竣工面积占商品房总竣工面积的比重为(  )。

2008年住宅竣工面积占商品房总竣工面积的比重为(  )。

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