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16.若一直徑為2π的半圓弧位於平面座標系的第一及第二象限,且其圓心恰巧落在座標點(0,0),則其重心位於: (A)(2,0) (B)(π,0)(C)(0,2)(D)(0,π)
問題詳情
16.若一直徑為2π的半圓弧
位於平面座標系的第一及第二象限,且其圓心恰巧落在座標點(0,0),則其重心位於:
(A)(2,0)
(B)(π,0)
(C)(0,2)
(D)(0,π)
參考答案
答案:C
統計:A:4,B:7,C:15,D:8,E:0
難度:適中
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