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17．Some experts on adolescent psychology argue that violent movies are potential factors of juvenile crimes．

分析 一些青少年心理學專家認為暴力電影是青少年犯罪的潛在因素．

解答 答案：potential
根據句意以及首字母的提示可知，此處的意思是：潛在的，由于此處用來修飾名詞factors，故填形容詞potential．

點評 做首字母填空題時，可根據句意以及首字母的提示判斷出空缺處的意思，從而確定出要填的單詞；然后從語法分析的角度，確定出應填單詞的形式；因此在平時的學習中，除了應牢固記憶單詞的拼寫之外，還要熟練掌握一些語法知識．

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