2. 外语
  3. ______ under a microscope, a fresh snowflake has a delicate six-pointed shape.

______ under a microscope, a fresh snowflake has a delicate six-pointed shape.

admin2008-06-13  16
问题 ______ under a microscope, a fresh snowflake has a delicate six-pointed shape.
选项 A、Seeing
B、Seen
C、To see
D、To be seen
答案B
解析 本句考查非谓语动词的用法。分词短语作状语，因为主语和分词之间的关系是动宾关系，因此用过去分词。
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