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单选题

A．It is made entirely of rocks.
B．It is not able to support an ocean.
C．It is smaller than previously thought.
D．It is closer to its host star than previously thought.

参考答案D

解析:暂无解析

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单选题

A．It showed that some exoplanets have an atmosphere like Earth's.
B．It helped researchers better understand exoplanets' orbits.
C．It showed that the technology exists to detect small exoplanets.
D．It proved that some stars' habitable zones are larger than once thought.

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单选题回答题
Section A
Directions: In this section, you will hear two long conversations. At the end of each conversation, you will hear four questions. Both the conversation and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D. Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre.
Questions 1 to 4 are based on the conversation you have just heard.

A．The man can't concentrate in the library.
B．The man wants to live near to the library.
C．The man dislikes talking and playing cards.
D．The man wants to find a quiet residence.

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单选题

A．The apartment is cheaper than the dorm.
B．Smoking is forbidden in the dorm.
C．The dorm is too noisy for him to write his essays.
D．He can't get along with his roommates.

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