What is black ,英语谜语

时间:2013-04-02 来源:谜语大全|脑筋急转弯 作者:英语谜语 点击:

What is black ,英语谜语

谜题是:What is black when it is clean and white when it is dirty?

(打一物体)

 

 

 

 

 

答案是:A blackboard黑板

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