What does the passage mainly discuss?___
A. The effect of the tides on Europa’s interior
B. Temperature variations on Jupiter’s moons
C. Discoveries leading to a theory about one of Jupiter’s moons
D. Techniques used by Voyager 2 to obtain close-up images.
查看答案
It can be inferred from the passage that astronomy textbooks prior to 1979___
A. provided many contradictory statistics about Europa
B. considered Europa the most important of Jupiter’s moons
C. did not emphasize Europa because little information of interest was available
D. did not mention Europa because it had not yet been discovered
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.
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.
___
A. To look up some terms.
B. To meet Stanley
C. To get a snack.
D. To prepare for an exam.
___
A. His library card.
B. A statistics book.
C. Some index cards.
D. A notebook.
微信支付 
支付宝支付