儿童游戏场的适用坡度为:( )A.0.3%~3.0% B.0.3%~2.5%

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问题 儿童游戏场的适用坡度为:(  )A.0.3%~3.0%B.0.3%~2.5%C.0.3%~3.5%D.0.3%~2.9%

选项 A.0.3%~3.0%
B.0.3%~2.5%
C.0.3%~3.5%
D.0.3%~2.9%

答案 B

解析
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