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[Issue Essay]

试题详情

题目:

Analytical!

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答案:

提问:

图发不上来,是一个半圆的隧道然后宽是20 The figure above shows the dimensions of a semicircular cross section of a one-way tunnel. The single traffic lane is 12 feet wide and is equidistant from the sides of the tunnel. If vehicles must clear the top of the tunnel by at least ½ foot when they are inside the traffic lane, what should be the limit on the height of vehicles that are allowed to use the tunnel? A. 5½ ft B. 7½ ft C. 8 ½ ft D. 9½ ft E. 10 ft

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提问:

老师,为什么d能加强呢?

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提问:

老师这道题为什么最小距离和所有可能的距离有什么差别?之前有类题做法A(8,8)/A(3,3)*A(2,2)

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老师,这道题我没什么思路

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提问:

这个我只能想到p^x和p^y个位数相乘为1,D是怎么做的?

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