The paragraph discusses Titans thick atmosphere and explains the conditions under which a body can have a thick atmosphere.
Explanation
According to the last two sentences of the paragraph, Titan was able to acquire an atmosphere because of a prevailing low temperature, but Ganymede and Callisto could not because they were at a higher temperature. Because the reason for this difference in temperature was their respective distances from the sun, Choice B is correct. The passage says nothing about differences in rate of heat loss, availability of methane andammonia, or distance from their planets, and it explicitly states that the three moons are the same size.
对于新gre逻辑阅读,考生除了采取题海战术,其实更应该做的就是总结。如果能从平日的练习中找到解新gre逻辑阅读题的思路,那么,要比采取题海战术更好。
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