超星 - U3-newsitem2.xls

单选题

Questions 3 and 4 are based on the following news item.

A. Orbital space around the star.
B. NASA discovered new habitable planets.
C. How Kepler spacecraft detects planets orbiting distance stars.
D. Why Earth and Mars are considered to be in the habitable zone .

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单选题

Question 4 音频同上

A. Orbital space that is close to the star.
B. Orbital space that keeps the planet's surface neither too hot nor too cold.
C. Orbital space that is far from the star.
D. Orbital space that is around the sun.

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