單項選擇題

Perihelion is the point where the Sun（）.

A.is nearest to the Earth
B.is farthest from the Earth
C.is on the opposite side of the Earth from the Moon
D.and Moon and Earth are in line

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單項選擇題

Other than the Sun and Moon，the brightest object in the sky is（）.

A.Sirius
B.Canopus
C.Venus
D.Jupiter

單項選擇題

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

Perihelion is the point where the Sun（）.

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Other than the Sun and Moon，the brightest object in the sky is（）.

Opposition occurs when（）.

Other than the Sun and Moon，the brightest object in the sky is（）.