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15．This dictionary isfive times as thick （ 5倍厚） as the one you borrowed from the library．（thick）

分析這本字典的厚度是你從圖書館借的一個字典的5倍厚．

解答答案：five times as thick
根據句意及提示，可知考查英語中使用as表達倍數的方式，結構為：倍數+as+形容詞或副詞的原級+as+其他．這種結構又常演變成下列兩類：①倍數+as+many+可數名詞復數+as；②倍數+as+much+不可數名詞+as．根據提示確定答案為：five times as thick．

點評解答這類題目，掌握英語中一些固定句式表達方式是關鍵，然后根據句意及提示確定正確內容．

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