2. 外语
  3. ______ as "the census taker of the sky", Annie Jump Cannon contributed considerably to the field of astronomy.

______ as "the census taker of the sky", Annie Jump Cannon contributed considerably to the field of astronomy.

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问题 ______ as "the census taker of the sky", Annie Jump Cannon contributed considerably to the field of astronomy.
选项 A、Known
B、Knowing
C、To know
D、Knowledge
答案A
解析 现在分词作状语时，与句子主语应为逻辑主谓关系；过去分词作状语时，和句子主语应为逻辑动宾关系，否则就形成了悬垂分词结构，如：(×)Looked up，she saw a bright moon hanging in the sky．(短语动词look up和句子主语she是逻辑主谓关系，故应改为使用现在分词作状语)抬头仰望，她看到一轮明月悬挂在天空。
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