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- 问题详情：Manyofusenjoywatchinganimalsintheworld.Butdoyouknowtheycanteachus.Geese(雁),forexample,teachaverygoodlessonabout1thefall,Canadageeseflytothewarmsouthto2Canada’scoldwinter.Theyliftoffinnoorder.Yet3theyformaVshape,withonebirdleadingthegroup.Th...
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