2. 外语
  3. Saturn, the farthest planet visible to the unaided eye, is almost twice as far from the sun as Jupiter is. Although Saturn is se

Saturn, the farthest planet visible to the unaided eye, is almost twice as far from the sun as Jupiter is. Although Saturn is se

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问题 Saturn, the farthest planet visible to the unaided eye, is almost twice as far from the sun as Jupiter is. Although Saturn is second in size only to Jupiter, its mass is significantly smaller. With a diameter of approximately 114,000 kilometers at the equator, Saturn’s rotational speed spins it completely around in a little more than ten hours. Either Saturn is composed entirely of gas, or it has a small dense center surrounded by a layer of liquid and a deep atmosphere. Saturn’s atmosphere is much like that of Jupiter, except that the temperature at the top of its cloud layer is at least 38 degrees C. lower.
The word that in the passage refers to
选项 A、gas
B、center
C、atmosphere
D、temperature
答案C
解析 The subject of the sentence is atmosphere. Logic tells you that that refers to atmosphere.
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