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
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
举一反三
- IT can be inferred from the passage that Europa and Antarctica have in common which of the following（） A: Both appear to have a surface with many craters B: Both may have water beneath a thin,hard surface C: Both have an ice can that is melting rapidly D: Both have areas encased by a rocky exterior
- It can be inferred from the passage that Europa and Antarctica<br/>have in common which of the following? ___ A: Both appear to have a surface with many craters. B: Both may have water beneath a thin, hard surface. C: Both have an ice can that is melting rapidly. D: Both have areas encased by a rocky exterior.
- According to the passage, what is the effect of Jupiter's other large moons on Europa（） 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 ar a steady level
- whichof the following is not the source of surface water? A: rivers B: ice C: reservoirs D: lakes
- The Arctic polar was crossed ______. A: by ice B: by water C: by land D: through the North-West Passage