15．www．sda．gov．cn，which has _____food and drug channel with clear explanations，is  _____very popular website．（　�。�
A．a，aB．a，theC．the，/D．/； a

分析 Www．sda．gov．cn是一個很受歡迎的網(wǎng)站，它有一個帶有明確解釋的食品和藥品的頻道．

解答 答案：A
根據(jù)句意可知，句中的 channel 以及 website都是可數(shù)名詞并且均表示泛指，分別指："一個帶有明確解釋的食品和藥品的頻道"以及"一個很受歡迎的網(wǎng)站"；故選A

點評 本題考查了不定冠詞的用法．做本題時，首先應(yīng)根據(jù)句意判斷出空缺處的意義所指（即表示泛指或特指）；其次應(yīng)熟練掌握定冠詞、不定冠詞以及零冠詞的具體用法及區(qū)別．

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