近年来,人类发射的多枚火星探测器已经相继在火星上着陆,正在进

近年来,人类发射的多枚火星探测器已经相继在火星上着陆,正在进行着激动人心的科学探究,为我们将来登上火星、开发和利用火星打下坚实的基础。如果火星探测器环绕火星做“近地”匀速圆周运动,并测得该运动的周期为T,若火星的平均密度为ρ。下列关系式中正确的是(   )

A.ρ∝T                     B.ρ∝

C.ρ∝T2                    D.ρ∝

答案

【解析】D。 由M=ρ·πR3可知ρ∝,选项D正确。

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