2. 外语
  3. The basic causes are unknown, although certain conditions that may lead to cancer have been______

The basic causes are unknown, although certain conditions that may lead to cancer have been______

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问题 The basic causes are unknown, although certain conditions that may lead to cancer have been______
选项 A、notified
B、qualified
C、identified
D、satisfied
答案C
解析 动词辨义。notify意为“宣告，通知”，如：notify one’s intention to the party concerned (把某人意图通知有关方面)；qualify 意为“使具有资格”，如：be qualified as a teacher(有资格当教师)；identify 意为“识别，鉴定”，如：identify handwriting(鉴定笔迹)；satisfy意为“满足，确保”，如：satisfy the people’s needs (满足人民需要)。根据句意可知，应选C)。
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大学英语四级

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