【判断题】【消耗次数：1】
以河道作为供水水源的，其保护范围为取水点上游1000米至下游500米的水域。
①
正确
②
错误
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水准点高程为24.397米，测设高程为25.000米的室内地坪。设水准点上读数为1.445米，则室内地坪处的读数为（ ）米。
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