题目内容：
地面塌陷发生时常伴有多种前兆，以下不属于此类地质灾害前兆的是（）A．气温异常变化
B．井、泉水位骤然上涨
C．水色变浑
D．地表出现地裂
参考答案：
单选：地面塌陷发生时常伴有多种前兆，以下不属于此类地质灾害前兆的是（）A．气温异常变化B．井、泉水位骤然上涨C．水色变浑D．地表出现地裂
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A．气温异常变化
B．井、泉水位骤然上涨
C．水色变浑
D．地表出现地裂
A．气温异常变化
B．井、泉水位骤然上涨
C．水色变浑
D．地表出现地裂
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