潜水员从水面先潜入水下25m,然后又上升18m,此时,潜水员在水下的什么位置,
人气：135 ℃ 时间：2019-10-14 07:32:58
解答
水面深度为0M 下潜25m 就是0-25=-25M
再上浮18M -25+18M=?会算了吗?
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