本题目来源于试卷: Physics Unit8: Rotational Motion，类别为 通用国际物理
[单选题]
The Earth orbits the Sun in an elliptical x7d)2:ehfow mxn e v)-orbit. Ignore any frictiooogci7r/ ccf./- ph7l,2blgeq1f w9 u n which may be presergpco77ufl g o.f/-iqlh1/wb,2ec 9c nt. What happens over time to the Earth's angular momentum about the Sun?
A. It continually increases.
B. It continually decreases.
C. It remains constant.
D. It increases during some parts of the orbit, and decreases during others.
参考答案: C
本题详细解析:
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