单选题
The author mentions "wispy marks" in line 19 as an example of
A、
( an aspect of the lunar surface discovered through lunar missions
B、
( a characteristic of large craters
C、
( a discovery made through the use of Earth-based telescopes
D、
( features that astronomers observed to be common to Earth and the Moon
【正确答案】
C
【答案解析】
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