中國網(wǎng)站品牌欄目（頻道）
A mother is very good at using every chance to educate his son, who was only three years old.
One day, she took a plug and said to her son, "Look, there are two pieces of copper, so it must be plugged in a place where there are two holes. Where do you think it should be plugged?"
She waited for an answer expectfully.
"Plug in nose." is the answer.
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