2. 外语
  3. Mercury is the nearest planet to the sun and its period of ______ is 88 days.

Mercury is the nearest planet to the sun and its period of ______ is 88 days.

admin2010-02-21  66
问题 Mercury is the nearest planet to the sun and its period of ______ is 88 days.
选项 A、movement
B、evolution
C、return
D、revolution
答案D
解析 movement运动；evolution进化；return返回；revolution革命，公转。
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