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25、右圖為某條河流的截面,形如拋物線,水深40公尺時,最深處O為頂點。當水深16公尺(B點的水位)時,水面的寬( )為64公尺,則水深25公尺時,水面的寬( )是?公尺。 (A) 40 (B) 60
問題詳情
25、右圖為某條河流的截面,形如拋物線,水深40公尺時,最深處O為頂點。當水深16公尺(B點的水位)時,水面的寬(
)為64公尺,則水深25公尺時,水面的寬(
)是?公尺。
(A) 40
(B) 60
(C) 80
(D) 100 公尺
參考答案
上一篇 :
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下一篇 :
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