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 at a steady level.
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According to the passage, which of the following is true about all early domesticated plants？
A. They were varieties of weeds.
B. They were moved from disturbed areas.
C. They succeeded in areas with many trees.
D. They failed to grow in trampled or damaged areas.
A．The class is going to study them.B．They evolved from brachiopods.C．They are similar
A. The class is going to study them.
B. They evolved from brachiopods.
C. They are similar to brachiopods in appearance.
D. They belong to the same species as brachiopods.
A．The lecturers are boring.B．The course is poorly designed.C．She prefers Philosophy to
A. The lecturers are boring.
B. The course is poorly designed.
C. She prefers Philosophy to English.
D. She enjoys literature more.
A．Orally preserved teachingsB．A collection of lettersC．A diaryD．A scholarly article
A. Orally preserved teachings
B. A collection of letters
C. A diary
D. A scholarly article
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