___ under a microscope, a fresh snowflake has a delicate six-pointed shape.
___ under a microscope, a fresh snowflake has a delicate six-pointed shape.
A、Seeing
B、Seen
C、To see
D、To be seen
【正确答案】:B
【题目解析】:句子真正的谓语是 has ,因此see 在这里做非谓语,它与snowflake 是被动关系,因此要使用过去分词形式,B正确。句意:在显微镜下看,新鲜的雪花呈精致的六角形。
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