More than one hundred years ago, students of ornithology reported that hummingbirds can hover as insects flitting gracefully from one flower to another.
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Aas insects flitting gracefully from one flower to another
分析该选项
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Blike insects flitting gracefully from one flower to another
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Cas insects do that flit gracefully from one flower to others
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Dlike insects do that flit gracefully from one flower to others
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Eas do insects that flit gracefully from one flower to some other one
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显示答案
正确答案: B