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歡迎您訪問數學考題練習:高度每增加1km,氣溫要降低5℃.現在地面溫度!

數學考題練習:高度每增加1km,氣溫要降低5℃.現在地面溫度

更新時間:2024-01-12 16:33:42作者:貝語網校

高度每增加1km,氣溫要降低5℃.現在地面溫度是8℃,那么3km高空的溫度是

A.21℃

B.7℃

C.-15℃

D.-7℃

試題答案

D

試題解析

根據高度每增加1km,氣溫要降低5℃,可計算3km高空降低的溫度,再讓8加上這個溫度即可.

解答:3米高空的溫度=8+3×(-5)=-7.

故選D.

點評:本題考查了有理數的混合運算.注意理解降低的意思就是減去的意思.

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