题目内容：
阅读以下材料，回答题。
According to this passage, turtles are of great importance in China because they are____________
参考答案：
答案解析：
单选题：阅读以下材料，回答题。According to this passage, turtles are of great i
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- 题目类型：单选题
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According to this passage, turtles are of great importance in China because they are____________