单选题
According to the passage, what is believed to cause the thin lines seen on Europa's surface?
A、
( A long period of extremely high tides
B、
( Water breaking through from beneath the surface ice
C、
( The continuous pressure of slush on top of the ice
D、
( Heat generated by the hot rocky core
【正确答案】
B
【答案解析】
提交答案
关闭