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Unless astronomers ______ their search for extraterrestrial life to stars as exc
Unless astronomers ______ their search for extraterrestrial life to stars as exc
游客
2025-05-05
30
管理
问题
Unless astronomers ______ their search for extraterrestrial life to stars as exceptional as the Sun, they are wasting much of their time.
选项
A、narrow down
B、boil down
C、tone down
D、let down
答案
A
解析
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