盒中有4个白球6个红球，无放回地每次抽取1个，则第二次取到白球的概率是（）

A．A

B．B

C．C

D．D

开放作文。

      请根据下面提示，写一篇短文。词数不少于50。

     In your English class, the teacher shows the picture below and asks the class to discuss it. Your

classmates may have different understandings. Look at the picture carefully and tell the crass how

YOU understand it. 

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