問題詳情
17. According to the passage, what is the effect of Jupiter's other large moons on Eurnpa?
(A) They prevent Europa's subsurface waters from freezing.
(B) They prevent tides that could damage Europa's surface.
(C) They produce the very hard layer of ice that characterizes Europa.
(D) They assure that the gravitational pull on Europa is maintained at a steady level.
(A) They prevent Europa's subsurface waters from freezing.
(B) They prevent tides that could damage Europa's surface.
(C) They produce the very hard layer of ice that characterizes Europa.
(D) They assure that the gravitational pull on Europa is maintained at a steady level.
參考答案
答案：A[無官方正解]
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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