科研之友
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摘要
<正>One day a first grade teacher was reading thestory of the Three Little Pigs to her class. Shecame to the part of the story where the first pigwas trying to accumulate(积攒) the building mate-rials for his home. She read,"... And so the pigwent up to the man with the wheelbarrow full ofstraw and said,‘Pardon me sir, but may I have
