题干
（附加题）按所给拼音提示，认真写出诗句。
bàn mǔ fāng táng yí jiàn kāi
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tiān guāng yún yǐng gòng pái huái
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wèn qú nǎ dé qīng rú xǔ
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wèi yǒu yuán tóu huó shuǐ lái
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答案(点此获取答案解析）
半亩方塘一鉴开，天光云影共徘徊。问渠那得清如许，为有源头活水来。
