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14. 小華身高 180 cm,眼睛距頭頂 10 cm,小明身高 160 cm,眼睛距頭頂 14 cm,今兩人欲合買一面鏡子,使兩人都可看到自己全身的像,則鏡長至少為 L1 cm,安裝時,鏡子頂部離地
問題詳情
14. 小華身高 180 cm,眼睛距頭頂 10 cm,小明身高 160 cm,眼睛距頭頂 14 cm,今兩人欲合買一面鏡子,使兩人都可看到自己全身的像,則鏡長至少為 L1 cm,安裝時,鏡子頂部離地高度為 L2 cm,則(L1,L2)為
(A)(90,175)
(B)(90,153)
(C)(102,175)
(D)(102,153)。
參考答案
答案:C
難度:非常困難0
統計:A(0),B(1),C(0),D(0),E(0)
上一篇 :
【題組】7. 謹 16 ,申之以 17 ,頒白者 18 矣!七十者 19 , 20 不飢不寒,然而不王者,未之有也!
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