单项选择题
Other than the Sun and Moon,the brightest object in the sky is().
A.Sirius
B.Canopus
C.Venus
D.Jupiter
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相关考题
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单项选择题
Opposition occurs when().
A.the Sun,Earth,and Moon are at right angles
B.the Sun's declination is 0°and is moving south
C.an inferior planet is at the maximum angle to the line of sight to the Sun
D.the Earth is between a planet and the Sun -
单项选择题
On mid-ocean waters,the height of a wind-generated wave is not affected by the().
A.water depth exceeding 100 feet
B.fetch
C.wind's velocity
D.duration of the wind -
单项选择题
Mars will not be visible().
A.at elongation angles near 180°
B.from quadrature to opposition
C.at conjunction
D.at opposition
