题目内容
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提问人：网友l******8
发布时间：2022年3月19日 13:34
[单项选择题]
WATER AND LIFE ON MARS 1 The presence or absence of water has a direct bearing on the possibi...What discovery led some scientists to think that the Martian atmosphere had produced heavy rains in the past（）
A．A network of canals on the surface
B．Ancient islands in a dry streambed
C．Water vapor lines on a photographic plate
D．Volcanic cones near the planet’s North Pole
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