問題詳情
13. The centripetal acceleration of a planet in an elliptical orbit about the sun is greatest when the planet is
(A)nearest the sun.
(B)nearest the Earth.
(C)farthest from the sun.
(D)farthest from the Earth.
參考答案
答案：A
難度：困難0.25
統計：A(1),B(1),C(2),D(0),E(0)